Total Tumor Removal Research Articles

A complete facet resection and cervical pedicle screw placement enhances both gross total resection and motion preservation for the cervical spinal dumbbell tumor

To describe single-index-level fusion surgery using a cervical pedicle screw (CPS) after the complete facet resection of spinal dumbbell tumors and to compare it with partial facet resection without fusion. We retrospectively reviewed patients who underwent surgery for dumbbell-shaped cervical spine tumors. They were categorized into the fused group (complete facet resection with fusion using CPS) and the unfused group (partial facet resection without fusion). We compared demographics, tumor characteristics, resection rates (gross total, subtotal, or partial), and regrowth rates between the groups. Complete facet resection was performed for maximal tumor removal. In the fused group, single-index-level fusion was achieved using CPS. Despite tumor-associated erosion of the index vertebra's pedicle and/or lateral mass, the CPS was directly inserted into the vertebral body through an imaginary virtual pedicle without a lateral mass or pedicle purchase. A total of 34 patients underwent surgery for dumbbell-shaped cervical tumors; half were classified into each group. There were no significant differences in demographic or tumor characteristics, including Asazuma classification, or histological diagnosis (P > 0.05). However, the gross total resection rate was significantly higher in the fused group (16/17, 94.1% vs 9/17, 52.9%; P-value = 0.011). Tumor recurrence was observed in three (17.6%) patients in the unfused group; no recurrence (0%) occurred in the fused group. Complete facet resection with fusion using CPS significantly increased the gross total tumor removal rate, compared with partial resection without fusion. Therefore, CPS improved fusion surgery for maximal motion preservation, resulting in single-level fusion surgery.

Current approaches to facial nerve schwannoma surgery.

Facial nerve schwannomas (FNSs) are exceedingly rare benign tumors. This study aims to report on a series of excised FNSs, providing clinical information and details on their surgical management, including novel approaches. We retrospectively reviewed patients who underwent surgical excision of FNSs in a private otology clinic and public tertiary referral center. The main outcome measures were facial nerve function, complete tumor removal, postoperative complications, tumor recurrence, and hearing. Seventeen patients (10 men and 7 women) with a mean age of 44.23 years (SD, 12.21) underwent surgery during the study period. The most common symptom was facial nerve dysfunction (58.8%). Facial and otoneurologic symptoms (hearing loss, tinnitus, and vertigo) were observed in 88.8% and 77.7% of patients, respectively. The middle cranial fossa (MCF) was the most common approach (six patients, 35.2%), followed by translabyrinthine (TL), transmastoid (TM), and combined TM-MCF (three patients, 17.6% each). Exclusive endoscopic transcanal suprageniculate (ETS) and mastoid combined with cervical approaches were applied once in two patients, 5.8% each. Total tumor removal was achieved in all cases. No significant postoperative complications were observed. The mean follow-up period was 193.2 months (SD, 119.5) and no tumor recurrence was observed. This study provides further evidence for the safety and efficacy of various surgical approaches for FNS, and incorporates the endoscopic transcanal approach. 4.

Clinical Features and Surgical Outcomes of Jugulotympanic Paraganglioma

Introduction: Jugulotympanic paraganglioma (JTP) refers to paraganglioma arising from jugular bulb, which can invade surrounding structures such as the bones, blood vessels, meninges, and cranial nerves. The authors conducted a study to find surgical indications to avoid a serious cranial nerve complications by analyzing the medical records of patients who underwent surgical management for JTP. Methods: We performed a single-institution, retrospective review of patients who underwent resection of JTP from 2004 to 2022. Patients underwent either Fisch infratemporal fossa approach type A (ITFA-A) or modification of ITFA-A with partial rerouting of the facial nerve. Preoperative and postoperative lower cranial nerve (LCN) function and facial function using the House-Brackmann (H-B) grade were evaluated. Results: The study included 19 patients with a mean age of 43.1 years (standard deviation [SD], 16.1 years). The average tumor size was 28.6 mm (SD 12.6 mm). In patients with Fisch classes C1 and C2 tumors, there were 3 and 11 patients, respectively. Gross total tumor removal (GTR) was performed in all patients with classes C1 and C2. GTR was achieved in 2 out of the 5 patients with class C3 tumor. Seventeen patients underwent ITFA-A and 2 patients underwent partial rerouting. Facial function before surgery was normal in all but 3 cases. Among 16 patients with preoperative normal facial function, 13 had H-B grade I to II and 3 had H-B grade III at 1 year after surgery. Total and partial rerouting did not significantly affect facial function immediately after surgery or at the postoperative 1-year evaluation (p = 1.00). Preoperative LCN function was normal in all patients. LCN palsy lasting more than 1 year occurred in 7 patients after surgery. Patients with Fisch class C1 tumor did not develop postoperative LCN palsy. Among the patients with class C2 tumor, none of 5 patients with medial invasion depth less than 9.5 mm developed LCN palsy, whereas 5 of 6 patients (83.3%) with invasion depth of 9.5 mm or greater developed LCN palsy (p = 0.02). Conclusion: JTPs with deep medial invasion should be managed conservatively to prevent LCN palsy.

Pseudocapsular resection to prevent recurrence in nonfunctioning pituitary neuroendocrine tumors: a retrospective, single-center study with more than 5 years of follow-up.

Pseudocapsular resection is a well-recognized, useful approach to achieve endocrinological remission in functioning pituitary neuroendocrine tumors (PitNETs). However, its advantage in nonfunctioning PitNETs (NF-PitNETs) has not been established. This study aimed to clarify the contribution of pseudocapsular resection to the prevention of NF-PitNET recurrence in long-term follow-up. This retrospective study included 132 patients who underwent total tumor removal and were followed for more than 5 years after surgery. The patients were categorized into those who underwent total pseudocapsular resection (n = 67) and those who did not (n = 65). The nonpseudocapsule (nonpseudocap) resection group included patients who underwent partial pseudocapsular resection and those in whom the pseudocapsule was not resected, did not exist, or could not be identified during surgery. The main outcome measures were the tumor recurrence rate and site of recurrence. In the nonpseudocap resection group, 2 patients (3.1%) had tumor recurrence in the cavernous sinus and 5 (7.7%) had tumor recurrence in the pituitary fossa. In the pseudocapsule (pseudocap) resection group, only 2 patients (3.0%) had tumor recurrence in the cavernous sinus and 0 patients had tumor recurrence in the pituitary fossa. Tumor recurrence in the pituitary fossa was more likely to occur in the nonpseudocap resection group than in the pseudocap resection group (p = 0.0267). Multivariate regression analysis revealed that pseudocapsular resection was a significant factor for reducing the tumor recurrence rate in the pituitary fossa (p = 0.0107). Pseudocapsular resection may reduce the rate of tumor recurrence and improve the management of NF-PitNETs in long-term follow-up.

NTRK-fused central nervous system tumours: clinicopathological and genetic insights and response to TRK inhibitors

Background Neurotrophic tropomyosin receptor kinase (NTRK) gene fusions are found in 1% of gliomas across children and adults. TRK inhibitors are promising therapeutic agents for NTRK-fused gliomas because they are tissue agnostic and cross the blood–brain barrier (BBB). Methods We investigated twelve NGS-verified NTRK-fused gliomas from a single institute, Seoul National University Hospital. Results The patient cohort included six children (aged 1–15 years) and six adults (aged 27–72 years). NTRK2 fusions were found in ten cerebral diffuse low-grade and high-grade gliomas (DLGGs and DHGGs, respectively), and NTRK1 fusions were found in one cerebral desmoplastic infantile ganglioglioma and one spinal DHGG. In this series, the fusion partners of NTRK2 were HOOK3, KIF5A, GKAP1, LHFPL3, SLMAP, ZBTB43, SPECC1L, FKBP15, KANK1, and BCR, while the NTRK1 fusion partners were TPR and TPM3. DLGGs tended to harbour only an NTRK fusion, while DHGGs exhibited further genetic alterations, such as TERT promoter/TP53/PTEN mutation, CDKN2A/2B homozygous deletion, PDGFRA/KIT/MDM4/AKT3 amplification, or multiple chromosomal copy number aberrations. Four patients received adjuvant TRK inhibitor therapy (larotrectinib, repotrectinib, or entrectinib), among which three also received chemotherapy (n = 2) or proton therapy (n = 1). The treatment outcomes for patients receiving TRK inhibitors varied: one child who received larotrectinib for residual DLGG maintained stable disease. In contrast, another child with DHGG in the spinal cord experienced multiple instances of tumour recurrence. Despite treatment with larotrectinib, ultimately, the child died as a result of tumour progression. An adult patient with glioblastoma (GBM) treated with entrectinib also experienced tumour progression and eventually died. However, there was a successful outcome for a paediatric patient with DHGG who, after a second gross total tumour removal followed by repotrectinib treatment, showed no evidence of disease. This patient had previously experienced relapse after the initial surgery and underwent autologous peripheral blood stem cell therapy with carboplatin/thiotepa and proton therapy. Conclusions Our study clarifies the distinct differences in the pathology and TRK inhibitor response between LGG and HGG with NTRK fusions.

A Case Report Demonstrating Preservation of Vestibular Receptor Function after Transcochlear Removal of an Intracochlear Schwannoma with Extension to the Fundus of the Internal Auditory Canal

Preservation of function is an important goal during surgical management of cochleovestibular schwannomas. We here demonstrate the relief of vertigo and the preservation of function of all five vestibular receptors after removal of an intracochlear schwannoma with extension to the fundus of the internal auditory canal. A 61-year-old male with a five-year history of left-sided deafness, tinnitus, vertigo attacks, and an MRI consistent with an intracochlear schwannoma with limited extension through the modiolus to the fundus of the internal auditory canal (IAC) underwent transcanal, transcochlear total tumor removal and—due to a cerebrospinal fluid leak from the fundus of the IAC—revision surgery with lateral petrosectomy and blind sac closure of the external auditory canal. Despite complete removal of the cochlear partition of the inner ear (total cochlectomy), the patient’s vestibular receptors remained functional, and the vertigo symptoms disappeared. These results show that vestibular labyrinthine function may not only be preserved after partial or subtotal cochlectomy but also after complete cochlear removal. This further confirms the vestibular labyrinth’s robustness and encourages surgical management of transmodiolar schwannomas with limited extension to the fundus of the IAC.

Modified Function-Preserving Endoscopic Endonasal Extracapsular Resection of a Large Orbital Apex Cavernous Hemangioma.

Various invasive oculoplastic procedures are commonly utilized to control the rectus muscles and widen the surgical corridor through the endoscopic endonasal removal of large orbital apex cavernous hemangiomas (OACHs). They require additional transconjunctival incision, rectus muscle insertional retraction, or muscle deinsertion at the globe that might not be safe and lead to prolonged postoperative extraocular muscle dysfunction. In this article, the authors described a modified 3-handed extracapsular technique for the resection of a large OACH without an additional procedure for rectus muscle control. The aim is to achieve a safe gross total tumor removal while minimizing the procedure-related complications. An intraoperative video is included, along with a stepwise cadaveric dissection relevant to the approach. A 71-year-old female presented with progressive left-sided blurred vision, binocular diplopia, and mild proptosis. Contrast-enhanced brain MRI revealed a large heterogeneous enhanced inferomedial intraconal mass in the left orbital apex, mostly consistent with cavernous hemangioma. Gross total tumor removal was achieved through a modified 3-handed endoscopic endonasal extracapsular approach. The diplopia was resolved, and significant visual improvement was achieved. Computed tomography scan demonstrated complete tumor removal, and histological examination confirmed the diagnosis. Endoscopic endonasal resection of large OACH can be feasibly performed by using a modified 3-handed extracapsular technique through the generous use of Q-tip swab applicators within the natural separation plane around the tumor capsule and a sequential traction-countertraction method. Subsequently, a gross total removal and optimal postoperative functional outcome are attainable through minimal rectus muscle fiber violation and intraconal fat manipulation.

Clinic and treatment of intramedullary ependymomas

Objective — to improve the results of treatment of patients with intramedullary ependymomas. Materials and methods. The results of treatment of 29 patients (14 men and 15 women aged 18 to 64 years) with intramedullary ependymomas operated on at the Romodanov Institute of Neurosurgery of the National Academy of Medical Sciences of Ukraine were analysed. All patients who were scheduled for surgery underwent magnetic resonance imaging (MRI) with paramagnetic contrast agent. The preoperative and postoperative neurological status was assessed using the modified McCormick scale. Results. Microsurgical technique for removal of spinal cord tumors was used in all 29 observations. According to the volume of tumor removal, operations with total (12 observations), subtotal (9 observations) and partial (8 observations) removal were distinguished. Removal of at least 95 % of the tumor volume, which was confirmed by visualization with a microscope during surgery and early postoperative MRI, was considered total. At the time of discharge from the hospital, in 11 patients (37.9 %) the neurological condition improved compared to the preoperative period, in 13 (44.8 %) it remained unchanged, and in 5 (17.2 %) there was an increase in neurological symptoms. 12 patients were examined 12—36 months after the operation. Improvement compared to the preoperative period was found in 10 patients, and no changes in 2. There were no cases of worsening of neurological symptoms during this period. MRI performed before discharge from the hospital showed almost normal spinal cord diameter in the area of surgical procedures, and MRI performed ≥ 3 months after total tumour removal showed atrophic changes in the spinal cord with ependymoma localisation at the thoracic level. Conclusions. Intramedullary ependymomas can be totally removed, and surgical intervention must be carried out immediately after the diagnosis before the appearance of signs of increasing neurological deficit. Thanks to the use of microsurgical techniques and an intraoperative microscope, it is possible to achieve positive functional results during the total removal of intramedullary tumors.

Neurofibroma of C2 root

Background: Intra and extradural neurofibromas of C2 root is a challenging pathology, usually with indolent evolution, that is why the onset symptoms are neurologic deficit just like upper cervical myelopathy symptoms and explains the late diagnosis of giant tumours with severe spinal cord compression with involvement and distortion of great vessels anatomy. These facts make surgeries more difficult. The follow-up of this type of surgery must be very close because CSF fistula can often occur. Case description: The present article reports a series of three cases of neurofibromas, two of them are giant dumbbell-shaped C2 neurofibromas and the third one is a case of neurofibromatosis type 1 of C2 roots bilaterally, C3 root unilateral with unusual postoperative course. Dural reconstruction was necessary in all cases. Conclusions: The patients in this series were very symptomatic with good recovery. The surgical procedures were challenging, total tumour removal was possible, and the reconstruction of dural defects was needed in all cases. In the case of NF1, the postoperative period was practically just the follow-up of complications and addressing them. This fact stresses the importance of meticulous preoperative planning and close follow-up. Postoperative quality of life was better than preoperative in all the cases. The purpose of the surgical treatment is the decompression of the spinal cord, tumour removal and prophylaxis of CSF fistula by closing the dural defects. Overall, the surgical C2 root neurofibromas resection is a safe procedure and is associated with good clinical outcomes.

Clinical study on the selection of endoscopes and microscopes for transsphenoidal surgery of non-aggressive pituitary macroadenoma and microadenoma and the influencing factors of hyposmia after endoscopic transsphenoidal surgery.

Transsphenoidal surgery, including endoscopic and microscopic resection, is the first choice of treatment for pituitary tumors. With the widespread application of neuroendoscopy in recent decades, there has been a trend to replace microscopes. In clinical practice, we have found that in transsphenoidal surgery for non-invasive microadenomas and macroadenomas, microscopy can achieve a higher total resection rate, shorter operation time, lower incidence of postoperative complications, and faster recovery of olfaction. This study aimed to explore the selection of endoscopes and microscopes for non-aggressive transsphenoidal surgery for pituitary adenomas and the factors affecting olfactory recovery. From August 2019 to October 2022, 93 patients with non-aggressive microadenomas and macroadenomas via the transsphenoidal approach were selected from the First Affiliated Hospital of Harbin Medical University and treated with rich experience in pituitary tumor subspecialty microscopy and endoscopic surgery. Different surgical methods were used to divide the patients into microscopic (n = 35) and endoscopic (n = 58) groups. The total tumor removal rate, intraoperative blood loss, operation time and cost, postoperative hospital stay, recovery of visual function, postoperative changes in hormone levels, complication rate, and recovery from complications 3 months after the operation were compared between the two groups. There were no significant differences in the tumor removal rate, postoperative visual acuity, and visual field recovery between the two groups (p > 0.05). There was a significant difference in the recovery rate of olfactory function between the two groups 3 months after the operation (p < 0.05), and there was no significant difference in the incidence of other complications (p > 0.05); Compared with the two groups, the microscope group had shorter operation time, longer postoperative hospital stay, less average operation cost and less blood loss, and the difference was statistically significant (p < 0.05). The position of the nasal septum mucosal flap incision was a risk factor for hyposmia 3 months after the operation. Microsurgery and endoscopic surgery are suitable surgical treatments for nonaggressive microadenomas and macroadenomas. The total tumor removal and postoperative hormone remission rates of the two surgical methods were approximately the same. However, the microsurgery group had a shorter operation time, less intraoperative blood loss, faster olfactory function recovery, and a lower average operation cost. The position of the nasal septal mucosal flap incision was a risk factor for hyposmia at 3 months postoperatively. Hyposmia is less likely to occur when the superior edge of the nasal septal mucosal flap incision is not higher than the lower edge of the ipsilateral superior turbinate.

Non-navigated 2D intraoperative ultrasound: An unsophisticated surgical tool to achieve high standards of care in glioma surgery.

In an era characterized by rapid progression in neurosurgical technologies, traditional tools such as the non-navigated two-dimensional intraoperative ultrasound (nn-2D-IOUS) risk being overshadowed. Against this backdrop, this study endeavors to provide a comprehensive assessment of the clinical efficacy and surgical relevance of nn-2D-IOUS, specifically in the context of glioma resections. This retrospective study undertaken at a single center evaluated 99 consecutive, non-selected patients diagnosed with both high-grade and low-grade gliomas. The primary objective was to assess the proficiency of nn-2D-IOUS in generating satisfactory image quality, identifying residual tumor tissue, and its influence on the extent of resection. To validate these results, early postoperative MRI data served as the reference standard. The nn-2D-IOUS exhibited a high level of effectiveness, successfully generating good quality images in 79% of the patients evaluated. With a sensitivity rate of 68% and a perfect specificity of 100%, nn-2D-IOUS unequivocally demonstrated its utility in intraoperative residual tumor detection. Notably, when total tumor removal was the surgical objective, a resection exceeding 95% of the initial tumor volume was achieved in 86% of patients. Additionally, patients in whom residual tumor was not detected by nn-2D-IOUS, the mean volume of undetected tumor tissue was remarkably minimal, averaging at 0.29 cm3. Our study supports nn-2D-IOUS's invaluable role in glioma surgery. The results highlight the utility of traditional technologies for enhanced surgical outcomes, even when compared to advanced alternatives. This is particularly relevant for resource-constrained settings and emphasizes optimizing existing tools for efficient patient care. NCT05873946 - 24/05/2023 - Retrospectively registered.

Periosteal Lipoma Compressing Peripheral Nerves

Introduction: Lipoma is a common benign, slow-growing soft tissue neoplasm. Periosteal lipomas of the proximal radius causing posterior interosseus nerve (PIN) palsy are the rarest. &#x0D; Due to specific anatomical relationships, proximal antebrachial lipomas can easily compress PIN. We present a case report and report on the related literature.&#x0D; Material and Methods: A 55-year-old female was admitted complaining of a progressively growing lump in the anterior-lateral antebrachial region near the left elbow. The recent onset of weakness in finger extension was more evident during manual work. &#x0D; MRI showed a well-defined oval lesion in the dorsal aspect of the proximal radius bone with inter-muscular laying between m. supinator et extensor carpi radialis brevis of 7x5x3 cm in diameter. EMG study confirmed PIN compression syndrome.&#x0D; An en-block extirpation was performed through extensor muscles. PIN and its muscular branches were well preserved. Histological examination confirmed lipoma. The postoperative course was uneventful, and a good recovery was seen within 12 days. &#x0D; We revised three other similar cases operated for the same Clinical diagnosis by our team. &#x0D; Pertinent literature was reported. &#x0D; Discussion: Periosteal radius lipoma related to compression of PIN has rarely been reported in the literature. We say our operative series and the surgical technique. MRI and EMG are the standard diagnostic methods. The intermuscular approach is safe for total tumor removal in experienced hands.&#x0D; Conclusion: Periosteal lipoma compressing PIN is a rare clinical finding. Total removal may be obtained through an intermuscular approach. Intraoperative monitoring can assist in preserving tiny PIN branches

The Significance of BRAF Mutation in the Epithelioid Glioblastoma Subtype: A Systematic Literature Review and a Case Report with a Unique Intraventricular Topography.

Epithelioid glioblastoma (E-GBM) is an exceedingly rare subtype of isocitrate dehydrogenase (IDH)-wildtype glioblastoma, first included in the WHO 2016 classification and characterized by a dominant population of epithelioid cells. Its histological and molecular defining features remain troublesome. The significance of BRAF mutations to pathological diagnosis and surgical outcome has drawn increasing attention given their promising potential for future adjuvant therapies. Herein, we describe a unique case of an E-GBM in the atrium of the left lateral ventricle and comprehensively analyze the importance of BRAF status in a cohort of 211 E-GBMs from the literature. Our patient was a 40-year-old man with occipital pain. His brain MRI revealed a large intraventricular tumor at the same location as a signal change found 10 years earlier with no additional follow-up. He underwent gross total tumor removal followed by conventional adjuvant treatment. Histopathological diagnosis was consistent with IDH-wildtype E-GBM WHO grade 4 with pleomorphic xanthoastrocytoma-like areas. BRAF p.V600 mutation was demonstrated in the tumoral genetic study. In the cohort analyzed, male patients predominated (63%), the median age was 32 years old, and the 5-year survival rate following diagnosis was 4.2%. BRAF mutations were found in 60.3% of the tumors overall, with this rate increasing to 78.3% in young adults (19-49 years, P < .001). Presence of BRAF mutations associated with tumor progression (P = .001), the event usually leading to death (P < .001). In conclusion, our study supports the importance of genetic BRAF p.V600 mutation analysis because its presence not only points to an E-GBM diagnosis but may also promote tumor progression.

A multicenter, randomized, placebo-controlled phase IIb trial of an autologous formalin-fixed tumor vaccine for newly diagnosed glioblastomas.

An autologous formalin-fixed tumor vaccine (AFTV) derived from resected glioblastoma (GBM) tissue can be used against unidentified tumor antigens. Thus, the authors conducted a multicenter double-blind phase IIb trial to investigate the efficacy of an AFTV. Eligible patients were adults with supratentorial GBMs, 16-75 years of age, with Karnofsky Performance Scale (KPS) scores ≥ 60%, and no long-term steroid administration. An AFTV comprising fixed paraffin-embedded tumor tissue with immune adjuvants or an identical placebo without fixed tumor tissue was injected intradermally over three courses before and after chemoradiotherapy. The primary and secondary end points were overall survival (OS), progression-free survival (PFS), and 3-year survival rate. Sixty-three patients were enrolled. The average patient age was 61 years. The median KPS score was 80%, and the median resection rate was 95%. The full analysis set of 57 patients indicated no significant difference in OS (p = 0.64) for the AFTV group (median OS 25.6 months, 3-year OS rate 38%) compared with the placebo group (31.5 months and 41%, respectively) and no difference in PFS (median PFS 13.3 months in both groups, p = 0.98). For patients with imaging-based total tumor removal, the 3-year PFS rate was 81% in the AFTV group versus 46% in the placebo group (p = 0.067), whereas the 3-year OS rate was 80% versus 54% (p = 0.16), respectively. Similar results were obtained in the p53-negative subgroups. Severe adverse effects were not observed. The AFTV may have potential effects in certain patient subgroups. A phase III study for patients with total tumor removal remains warranted to confirm these findings. Clinical trial registration no.: UMIN000010602 (UMIN Clinical Trials Registry).

Surgical Approaches to Craniopharyngiomas

Surgical treatment of craniopharyngioma still presents several challenges. The tumor recurs at a high rate when its removal is insufficient. However, total resection of the tumor has a high risk of complications owing to its proximity to the hypothalamus and the pituitary stalk. In addition, tumor control by radiation treatment is insufficient for long follow-up periods of over 10 years. Therefore, various treatments have been selected, ranging from partial tumor removal followed by radiation to total tumor removal, even if it involves sacrificing pituitary functions. In this article, we explain the surgical treatment with a focus on endoscopic endonasal surgery for craniopharyngiomas.

Comparative characteristics of extended endoscopic endonasal operations in giant pituitary adenomas with ventricular system extention and craniopharyngiomas

Objective ‒ to evaluate the results of extended endonasal interventions in patients with craniopharyngioma (CPH) and giant pituitary adenoma (GPA) with an extension to ventricular system, to compare the effects of interventions in these pathologies, to determine the basic principles of extended endoscopic endonasal surgical interventions. Materials and methods. The study is based on a retrospective analysis of patients endoscopically operated through the nose in the Department of Endonasal Neurosurgery of the Skull base in the SI «Romodanov Neurosurgery Institute NAMS of Ukraine» from 2014 to 2021. In the group with GPA were 18 (36.7 %) female and 31 (63.3 %) male patients. The mean age of the patients was 54.1±11.3 years. The CPH group included 42 (60.9 %) women and 27 (39.1 %) men. The mean age in this group was 46.6±14.5 years. Results. In 14.3 % of GPA cases, postoperative cerebrospinal fluid leak (CSFL) occurred, which is statistically insignificant compared to the postoperative CSFL level at CPH – 13 %, despite the fact that when removing GPA, we routinely encountered high-flow liquorrhea, given the characteristics of tumor growth (p=0.921). The number of electrolyte abnormalities with CPH was higher than with GPA removal (40.5 % with CPH versus 16.3 % with GPA). For the first time, diabetes insipidus requiring the prescription of hormone replacement therapy due to the removal of GPA that were extending to the ventricular system was diagnosed in the postoperative period in 12.2 % of patients versus 33.3 % in CPH group. Endocrine disorders in the form of hypopituitarism were found in 34.7 % of GPA and 44.9 % of CPH. The median duration of the operation was 227.9±74.9 min for GPA and 318.4±65.4 min for CPH. The area of the trepanation window is always larger in GPA, as it includes an enlarged sellar window and, sometimes, a parasellar direction in the invasion of the cavernous sinuses. Decompression of the optic canals was performed almost exclusively in GPA that extend parasellarly and/or retrosellarly (38,0 % with CPH in comparison to 5.8 % in the GPA group). Closure of the skull base defect was performed with autologous and artificial materials in all cases, as the removal of GPA and CРН was always accompanied by high-flow intraoperative CSFL.Conclusions. After analyzing the results of endonasal surgeries performed in GPA with extension to the ventricular system and CPH, it was noted that the use of extended transtuberculum-transplanum approach provides a wide surgical corridor and provides the possibility of total tumor removal. It is essential to install a lumbar drainage system when working in open liquid spaces. In our opinion, the priority should be given to the safety of operations and prevention of postoperative interventions (preservation of the pituitary stem, perforating arteries, chiasm, minimization of manipulations with the diencephalic areas and the bottom of the III ventricle), rather than increasing radicality in CPH, as in GPA. Fatty graft packaging should be avoided for CPH located near the junction of the optic nerves (in the anterior position of the chiasm), as the absence of the arachnoid barrier increases the risk of involving the optic structures in the postoperative scar.

Basal interhemispheric approach for sellar and juxta-sellar lesions

BackgroundSellar and juxta-sellar lesions represent a surgical challenge due their deep and complex relationships to surrounding important neurovascular structures. The basal interhemispheric (BIH) approach, as a midline approach, has an advantage over the lateral approaches as it allows for the safe removal of these challenging tumors.AimTo describe the technique of BIH approach in a prospective cohort of 17 patients with sellar and juxta-sellar lesions with different pathologies presented to Alexandria Main University and affiliated hospitals. As well as the clinical outcome and complications of this technique, these cases were followed up for a mean period of 20 weeks.ResultsGross total resection was achieved in 9 cases (52.9%), subtotal resection was achieved in 5 cases (29.5%), while partial resection was carried out in 3 cases (17.6%). Visual status improved following surgery in 10 patients (58.8%), remained stationary in 5 patients (29.4%) and worsened in 2 cases. Post-operative shunt was needed in three cases, and severe water and electrolyte disturbance was recorded in 3 cases and pan-hypopituitarism in a single case. A single mortality was recorded, but it was due to pulmonary embolism and was not related to the approach.ConclusionBIH could be a panoramic safe approach that allows tumor removal from multiple corridors with identification of the regional anatomy of the tumor thus elaborating the surgical strategy for gross total tumor removal.

Pineal parenchymal tumor of intermediate differentiation with late spinal dissemination 13 years after initial surgery: illustrative case.

Pineal parenchymal tumors of intermediate differentiation (PPTIDs) are rare in the pineal gland. A case of PPTID that disseminated to the lumbosacral spine 13 years after the total resection of a primary intracranial tumor has been reported. A 14-year-old female presented with headache and diplopia. Magnetic resonance imaging revealed a pineal tumor that induced obstructive hydrocephalus. A biopsy and endoscopic third ventriculostomy were performed. Histological diagnosis revealed a grade II PPTID. Two months later, the tumor was removed via craniotomy because the postoperative Gamma Knife surgery was ineffective. Histological diagnosis confirmed PPTID, although the grade was revised from II to III. Postoperative adjuvant therapy was not performed, because the lesion had been irradiated and gross total tumor removal was achieved. She has had no recurrence in 13 years. However, pain around the anus newly appeared. Magnetic resonance imaging of the spine revealed a solid lesion in the lumbosacral spine. The lesion was subtotally resected, and histological diagnosis revealed grade III PPTID. Postoperative radiotherapy was performed, and she had no recurrence 1 year after radiotherapy. Remote dissemination of PPTID can occur several years after the initial resection. Regular follow-up imaging, including the spinal region, should be encouraged.

Anaplastic glioma diagnosis and its therapeutic significance

Despite sufficient provision and active use of modern neuroimaging technologies, it is often too late to diagnose glioma. Clinical symptoms in anaplastic glioma appear within a period of 1-2 years and in glioblastoma - within less than a year. The use of new diagnostic equipment (multi-slice CT, high-angle MRI, and their varieties - MR spectroscopy, fMRI, diffusion tensor MRI, stereotactic diagnostics) allows identifying diseases that were previously detected only after autopsy. Despite the modern method of diagnosing a malignant brain tumor, its early diagnosis remains an urgent problem. At the same time, total removal of brain tumors is a difficult task for neurosurgeons. Thus, according to control CT and MRI of the brain, the radicality of resection reaches 40-50%. Practical application of modern neuroimaging technologies is being actively studied, but their use in HGG is still limited.

Prognostic Factors for Parasagital Meningiomas Recurrence

the study is relevant due to high prevalence of this type of pathology. Meningiomas account for 18% to 34% of all primary brain tumors. Parasagital meningiomas occur in 24.3% to 38.6% of cases. Despite their predominantly benign nature, parasagital meningiomas are more likely to recur/continue growing than meningiomas in other areas (18% to 40%). The key purpose of the study was to analyze the prognostic factors of parasagital meningiomas recurrence/continued growth, which will eventually improve surgical treatment outcomes. We conducted a retrospective and prospective analysis of 199 parasagital meningioma patients who were treated in Mechnikov Dnipropetrovsk Regional Clinical Hospital, Dnipropetrovsk Regional Council, from 2000 to 2021 inclusive. This article is based on a comparative analysis of the results of examination and surgical treatment and further analysis of pathohistological conclusion in two study groups. The first group included 180 (90.5%) patients with no recurrence/continued growth and second group included 19 (9.5%) patients with detected postoperative parasagital meningioma (PM) recurrence/continued growth. The selected patients were analyzed for demographic data (gender, age); computed tomography and magnetic resonance brain imaging results before and after adding an intravenous contrast (in terms of key characteristics); angiographic studies data (computed tomography angiography/selective digital subtraction cerebral angiography); surgical radicality; pathohistological conclusions; recurrence-free period duration (one to 20 years after the surgery). In the follow-up period, 19 (9.5%) patients had PM recurrence/continued growth. In the first year after the surgery, only 2 of those patients had continued PM growth; within 5 years (60 months), 12 patients; within 10 years, 17 patients; the percentage of no- recurrence patients, based on censored data (recurrence-free survival), was 99.0% (95% CI, 97,6-100), 93,1% (95% CI, 89.3-96.9). and 87.5% (95% CI, 81.6-93.4) in the above follow-up periods. The actual median time to recurrence in our study was 44.1 (25.7; 85.4) months. It means that the majority (12 of 19 patients; 63.2%) of continued PM growth was detected within 5 years after the surgery. The last case of PM recurrence was diagnosed after 13 years (154.5 months) of the follow-up. Thus, recurrence-free 5- and 10-year survival in PM patients is as follows: in case of total tumor removal (Simpson I), 96.0% and 85.5%, respectively; in case of non-radical removal (Simpson II-V), 88.9% (p&lt;0.05) and 81.9% (p&lt;0.05), respectively. At the same time, non-radical surgery in type I-II SSS invasion by the PM reduces 5- and 10-year recurrence-free survival to 86.6% (p&lt;0.01) and 78.3% (p&lt;0.01), respectively; in case of tumor size of up to 54 mm, the indicators are 95.5% and 91.4%; with tumor size &gt;54 mm, they are as low as 87.5% (p&lt;0.001) and 72.5% (p&lt;0.001); in case of type I-III or V-VI SSS damage according to M. P. Sindou and J. E. Alvernia, 94.0% and 89.1%; and in case of type IV invasion, 66.5% (p&lt;0.01) and 43.5% (p&lt;0.001); in female patients, 95.2% and 88.5%; in male patients, 84.8% (p&lt;0.05) and 73.0% (p&lt;0.01). According to the Cox regression proportional hazards model, the relative risk of tumor recurrence/continued growth increases by: 7.04 times (95% CI, 2.33-21.2) in case of initial PM size &gt;54 mm (p&lt;0.001); 5.57 times (95% CI, 1.27-24.34) in case of non-radical (Simpson II-V) tumor removal during primary intervention (P&lt;0.05); 10.1 times (95% CI, 1.31-78.1) in case of type I-II SSS invasion by the PM or incomplete (Simpson II-V) tumor removal (p&lt;0.05); 3.25 times (95% CI, 1.32-8.02) in male patients (p&lt;0.01); 3.33 times (95% CI, 1.10-10.12) in case of type IV SSS invasion (according to M.P. Sindou and J.E. Alvernia) (p&lt;0.05). Adequate analysis of the results obtained will help the neurosurgeons plan the optimal surgery volume and ensure further postoperative recurrence-free period and improved long-term treatment outcomes.