Patients Underwent Tumor Resection Research Articles

Tectal glioma: clinical, radiological, and pathological features, and the importance of molecular analysis.

Tectal glioma (TG) is a rare lower grade glioma (LrGG) that occurs in the tectum, mainly affecting children. TG shares pathological similarities with pilocytic astrocytoma (PA), but recent genetic analyses have revealed distinct features, such as alterations in KRAS and BRAF. We conducted a retrospective review of cases clinically diagnosed as TG and treated at our institute between January 2005 and March 2023. Six cases were identified and the median age was 30.5years. Four patients underwent biopsy and two patients underwent tumor resection. Histological diagnoses included three cases of PA, one case of astrocytoma, and two cases of high-grade glioma. The integrated diagnosis, according to the fifth edition of the World Health Organization Classification of Tumours of the central nervous system, included two cases of PA and one case each of diffuse high-grade glioma; diffuse midline glioma H3 K27-altered; glioblastoma; and circumscribed astrocytic glioma. Among the three patients who underwent molecular evaluation, two had KRAS mutation and one had H3-3A K27M mutation. Our results demonstrate the diverse histological and molecular characteristics of TG distinct from other LrGGs. Given the heterogeneous pathological background and the risk of pathological progression in TG, we emphasize the importance of comprehensive diagnosis, including molecular evaluation.

An intracerebral microdialysis study to determine the neuropharmacokinetics of eribulin in patients with metastatic or primary brain tumors.

Eribulin is an inhibitor of microtubule dynamics. It is not as highly protein bound as the taxanes and is less vulnerable to extrusion by P-glycoprotein in the blood-brain barrier (BBB). These features predict that eribulin could play an active role in managing brain tumors. Indeed, the small amount of published clinical data indicates eribulin may have some efficacy against breast cancer brain metastases. To better understand the potential of eribulin for treating brain tumors, we performed an intracerebral microdialysis study to determine the neuropharmacokinetics of eribulin in cancer patients undergoing tumor resection. After tumor removal, two microdialysis catheters were inserted into peritumoral brain tissue. Approximately 24h after surgery, a single dose of eribulin 1.4mg/m2 was administered intravenously. Dialysate samples were collected continuously for 72h, with plasma samples collected in parallel. Eribulin concentrations were analyzed by tandem mass spectrometry. Dialysate samples from 12 intracerebral microdialysis catheters placed in 7 study participants were included in the analysis. A statistically significant difference was observed between eribulin concentrations in brain tissue where BBB was disrupted versus intact, with a difference in mean maximum concentrations on log2 scale of 3.37 (std err = 0.59, p-value = 0.005). Nonetheless, overall brain to plasma ratios of eribulin only ranged from 0.13 to 1.99%. Although we could detect higher concentrations of eribulin in brain tissue where BBB was disrupted, intracerebral eribulin levels were not sufficient to predict eribulin would have consistent clinically meaningful activity against tumors in the brain. NCT02338037 (January 9, 2015).

Perioperative antibiotic use in pediatric solid tumor resection: A two-center retrospective cohort Study

PurposeThere is no consensus on the perioperative use of antibiotics in pediatric solid tumor resection. This study collected data from two pediatric centers that utilize perioperative antibiotics to varying degrees in pediatric solid tumor patients to investigate the occurrence of postoperative sepsis and infectious complications. MethodsA two-institution, retrospective cohort study was performed. Charts of children who underwent solid tumor resection between July 2018- June 2021 were reviewed. Patient characteristics, diagnosis, operative data, perioperative antibiotic use, and postoperative infection/sepsis were analyzed within 30 days of surgery. The primary outcome was surgical site infection (SSI) or systemic sepsis within 30 days of surgery. Fisher’s tests were performed to evaluate differences. Results250 patients underwent tumor resection between July 2018 and June 2021 at both centers. The median age was 4 years [Range: 0.02 – 26.1]. Seventy-five percent (N = 188) received perioperative antibiotics prophylaxis (AP), while 25% of patients did not receive AP (N = 62). Only one patient in the AP group (0.5%) developed postoperative sepsis, while 12 patients (19.4%) in the non-AP group developed sepsis (p<0.0001). There were 3 SSI in the AP group and none in the non-AP group (p=1.0). ConclusionsThe administration of AP in children undergoing solid tumor resection is associated with a reduced rate of postoperative sepsis but no difference in SSI. This could possibly be related to bacterial translocation during surgery and the seeding of indwelling central venous access catheters. Our results support the standardized use of AP in this population. Type of StudyRetrospective Cohort Study Level of EvidenceIII

Bone mineral density as a prognostic marker in patients with biliary tract cancer undergoing surgery

BackgroundBiliary tract cancer (BTC) is one of the most aggressive malignancies and surgery represents the only curative treatment approach. However, even in patients with complete tumor resection 5-year survival rates are below 30%. So far, prognostic markers to assess the outcome of these patients are lacking. We therefore evaluated bone mineral density (BMD) as a prognostic tool in patients receiving surgery for BTC.methods76 BTC patients undergoing tumor resection in our clinic (Duesseldorf cohort) as well as an external validation cohort of 34 BTC patients (Cologne cohort) were included. BMD was analyzed at the first lumbar vertebra, using routine CT scans which has been proven comparable to DXA.ResultsMedian overall survival (OS) of the Duesseldorf cohort after surgery was 527 days, one- and five-year survival probabilities were 62 and 18%. Patients with BMD above 156.5 HU had significantly improved OS (1435 days vs. 459 days; p = 0.002). The prognostic value for BMD was confirmed using Cox-regression analysis, as well as an external validation cohort. In subgroup analysis the prognostic effect of BMD was only present in female patients, suggesting sex specific differences.ConclusionBMD is a valuable, easily accessible and independent prognostic marker in patients receiving liver surgery for BTC.

To introduce a new method of resection of carotid body tumor with preservation of the internal carotid artery ----microscopic coagulation method

Objective:To introduce the surgical experience of carotid body tumor（CBT） resection with preservation of internal carotid artery. Methods:The clinical data of 109 patients with CBT were retrospectively analyzed. The key points of surgical techniques were summarized, the imaging and pathological results were comprehensively analyzed, and the postoperative complications were observed. Results:Of the 109 patients, 28 were Shamblin Ⅰ, 46 were Shamblin Ⅱ, and 35 were Shamblin Ⅲ. Synaptophysin（SYN） and soluble protein-100（S-100） were positive in all cases. There was a positive correlation between the average expression area percentage of S-100 and SYN in pathological tissue of 17 patients（r=0.48）, and the difference was statistically significant（P<0.05）. The average operation time was（148.4±46.2） minutes, the average intraoperative blood loss was（64.7±22.8） mL, and the average hospital stay was（15.2±2.6） days. Three patients underwent tumor resection combined with external carotid artery ligation, 1 patient underwent tumor resection combined with internal carotid artery ligation, and the remaining patients underwent tumor resection alone. The overall rate of intraoperative vascular ligation was 3.7% and the rate of nerve injury was 6.4%. According to preoperative CTA, intraoperative situation and postoperative pathological results, a new classification of CBT was proposed, which could intuitively reflect the gap between the tumor and the carotid artery and the nature of the tumor. Conclusion:Surgical resection of CBT is recommended after diagnosis. The potential gap between the tumor and the blood vessels was found under the microscope. Low energy bipolar electrocoagulation was used to coagulate and cut off the fibrous connective tissue between the tumor and gradually separated along the adventitia of the artery. The carotid artery could be preserved in most cases while the tumor was completely removed, and the amount of intraoperative bleeding and the incidence of complications were reduced. It is particularly important to identify the difficult cases before operation.

A CARE-compliant article: A case report of retroperitoneal endometrial stromal sarcoma with multiple pulmonary metastases and literature review.

Endometrial stromal sarcoma is an extremely rare mesenchymal neoplasm occurring in the extrauterine. Retroperitoneal endometrial stromal sarcoma with multiple pulmonary metastases, in particular, is extremely rare. Forty-seven-year-old woman (gravida 3, para 2), was referred to our institution with complaints of fever. Ultrasound and computed tomographic imaging of the abdomen identified the presence of masses in the pelvic region. Additionally, computed tomographic scans and X-ray evaluations of the thorax detected dispersed masses in both the lungs and pelvic area. Histopathological analysis of the pelvic region indicated the presence of low-grade endometrial stromal sarcoma. A computed tomography-guided pneumocentesis was conducted to further characterize the pulmonary lesions, confirming the diagnosis of low-grade endometrial stromal sarcoma. The patient underwent tumor resection, subsequent treatment with Medroxyprogesterone acetate for 6 months, received microwave ablation for multiple lung metastases, PARP1 inhibitor for 4 courses, and has been undergoing chemotherapy (epirubicin/ifosfamide) up to the present time. Partial remission was obtained after the above treatment and this patient is now still alive maintaining for 3 years. The identification and management of this disease remain a significant challenge due to its low prevalence. Further research involving a larger number of cases is necessary to ensure consistency in diagnosis and to establish effective treatment guidelines.

Corticoadrenaloma: A case report from the pediatric haemato-oncology and pediatric endocrinology departments at the Hassan II University Hospital of Fez

Adrenocortical carcinoma is a rare tumor, representing 0.2% of pediatric cancers. Diagnosis is made on a combination of clinical, biological, radiological, and anatomopathological arguments. Treatment involves tumor excision surgery, sometimes supplemented by chemotherapy for forms with a high risk of recurrence. Prognosis is often reserved, with a non-negligible death rate. This report presents three cases of adrenocortical carcinoma treated at our institution between 2017 and 2023. The patients were three girls aged 5 years, 8 months, and 11 years, respectively. They were admitted for signs of hyperandrogenism and arterial hypertension. The tumor was left adrenal in all patients. The histological score was Severe Weiss 6 or 7. All patients underwent tumor resection, and they all benefited from this procedure. Despite chemotherapy in one patient, normalization of blood pressure figures postoperatively, two patients progressed to recurrence and subsequently died. The objective of this study is, through three observations, to describe the problem of the management of adrenocortical carcinoma (ACC) on the one hand, and to review the literature on the management and the prognosis of corticosteroid ACC in children.

Abstract 3778: Comprehensive analysis of single disseminated cancer cells identifies a stem-like phenotype with strong prognostic impact

Abstract Introduction: Recent studies on disseminated cancer cells (DCCs) in Non-Small-Cell Lung Cancer (NSCLC) patients demonstrated their clinical relevance even in early tumor stages. However, their molecular and phylogenetic link to the primary tumor is currently unclear. Certain genetic alterations, such as TP53 or KRAS mutations, have been proposed to be clonal events and drivers of dissemination and metastasis. In this study, we analyzed the genome and transcriptome of single DCCs to identify the characteristics of early DCCs and their translational clinical value. Materials and methods: From 2011 to 2019 we prospectively collected and analyzed bone marrow aspirates and lymph node samples from 296 newly diagnosed NSCLC patients undergoing tumor resection with curative intention. Presence of DCC was examined by i) immunocytology (IC) for Cytokeratin (clone A45-B/B3, bone marrow, BM-DCCs) or EpCAM (clone BerEp4, lymph node, LN-DCCs) and ii) immunofluorescent (IF) staining for EpCAM in a live cell suspension (clone HEA-125) from BM or LN. Single cells were isolated using micromanipulation and subjected to Whole Genome Amplification or combined Whole Genome/Transcriptome Amplification for IC and IF, respectively. Sanger sequencing for known hotspot mutations in TP53 and KRAS was performed on single DCCs. Gene expression profiles of DCCs were analyzed by single cell RNA sequencing and the results were compared with clinical data with a mean follow-up of 2.93 years (range 0.03-7.22). Results: LN-DCCs were found in 44.8% and 59.6% by IC and IF, respectively. CKIC pos BM-DCCs were found in 45.2%, while EpCAMIF pos BM-DCCs were present in 52.8%. LN-DCCs correlated with reduced tumor-specific survival (TSS, p=0.009) and progression-free survival (PFS, p=0.025). EpCAMIF pos, but not CKIC pos BM-DCCs correlated with reduced TSS (p=0.003) and PFS (p=0.083). Genetic analysis of single DCCs revealed that TP53 or KRAS mutations could be found in 3.6% and 2.8% of analyzed BM-DCCs and 5.0% and 29.3% of LN-DCCs for IF and IC, respectively. Single cell RNA-seq showed distinct transcriptomic profiles for LN- and BM-DCCs, and identified a DCC phenotype with high stemness score in the bone marrow. Further analysis of potential transcriptome-based biomarkers identified a novel candidate marker for activated EpCAMpos BM-DCCs that strongly correlates with PFS and TSS (p&amp;lt;0.001). Conclusions: DCCs in early-stage NSCLC have high prognostic value and predict reduced PFS and TSS. While genetic alterations in the TP53 and KRAS gene were not detected in the majority of analyzed DCCs, transcriptomic phenotypes provided relevant information and identified a subset of activated DCCs that correlate strongly with relapse and poor outcome. Citation Format: Tobias Mederer, Daniel Spitzl, Felix Elsner, Bernhard Polzer, Michael Ried, Reiner Neu, Tobias Robold, Hans-Stefan Hofmann, Christoph A. Klein. Comprehensive analysis of single disseminated cancer cells identifies a stem-like phenotype with strong prognostic impact [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2024; Part 1 (Regular Abstracts); 2024 Apr 5-10; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2024;84(6_Suppl):Abstract nr 3778.

CD34+DNAM-1brightCXCR4+ haemopoietic precursors circulate after chemotherapy, seed lung tissue and generate functional innate-like T cells and NK cells.

There is little information on the trajectory and developmental fate of Lin-CD34+DNAM-1bright CXCR4+ progenitors exiting bone marrow during systemic inflammation. To study Lin-CD34+DNAM-1bright CXCR4+ cell circulation in cancer patients, to characterize their entry into involved lung tissue and to characterize their progenies. Flow cytometric analysis of PBMC from 18 patients with lung cancer on samples collected immediately before the first and the second treatment was performed to study Lin-CD34+DNAM-1bright CXCR4+ precursors. Precursors were purified (>99%) and cultured in vitro from all patients. Paired PBMC and tissue samples from patients undergoing tumor resection were analyzed by flow cytometry to assess tissue entry and compare phenotype and developmental potential of Lin-CD34+DNAM-1bright CXCR4+ cells in both compartments. Significant circulation of Lin-CD34+DNAM-1bright CXCR4+ precursors was observed 20d after the first treatment. Precursors express CXC3CR1, CXCR3, CXCR1 consistent with travel towards inflamed tissues. Flowcytometric analysis of lung tissue samples showed precursor presence in all patients in tumor and neighboring uninvolved areas. Successful purification and in vitro culture from both blood and lung tissue generates a minor proportion of maturing NK cells (<10%) and a predominant proportion (>85%) of α/β T-progenies with innate-like phenotype expressing NKG2D,NKp30,DNAM-1. Innate-like maturing T-cells in vitro are cytotoxic, can be triggered via NKR/TCR co-stimulation and display broad spectrum Th1,Th2 and Th1/Th17 cytokine production. In advanced stage lung cancer CD34+DNAM-1brightCXCR4+ inflammatory precursors increase upon treatment, enter involved tissues, generate functional progenies and may thus represent an additional player contributing to immune balance in the highly SDF-1/CXCR4-biased pro-metastatic tumor microenvironment.

Comparative study of orthopaedic robot-assisted minimally invasive surgery and open surgery for limb osteoid osteoma

To compare the accuracy and effectiveness of orthopaedic robot-assisted minimally invasive surgery versus open surgery for limb osteoid osteoma. A clinical data of 36 patients with limb osteoid osteomas admitted between June 2016 and June 2023 was retrospectively analyzed. Among them, 16 patients underwent orthopaedic robot-assisted minimally invasive surgery (robot-assisted surgery group), and 20 patients underwent tumor resection after lotcated by C-arm X-ray fluoroscopy (open surgery group). There was no significant difference between the two groups in the gender, age, lesion site, tumor nidus diameter, and preoperative pain visual analogue scale (VAS) scores ( P>0.05). The operation time, lesion resection time, intraoperative blood loss, intraoperative fluoroscopy frequency, lesion resection accuracy, and postoperative analgesic use frequency were recorded and compared between the two groups. The VAS scores for pain severity were compared preoperatively and at 3 days and 3 months postoperatively. Compared with the open surgery group, the robot-assisted surgery group had a longer operation time, less intraoperative blood loss, less fluoroscopy frequency, less postoperative analgesic use frequency, and higher lesion resection accuracy ( P<0.05). There was no significant difference in lesion resection time ( P>0.05). All patients were followed up after surgery, with a follow-up period of 3-24 months (median, 12 months) in the two groups. No postoperative complication such as wound infection or fracture occurred in either group during follow-up. No tumor recurrence was observed during follow-up. The VAS scores significantly improved in both groups at 3 days and 3 months after surgery when compared with preoperative value ( P<0.05). The VAS score at 3 days after surgery was significantly lower in robot-assisted surgery group than that in open surgery group ( P<0.05). However, there was no significant difference in VAS scores at 3 months between the two groups ( P>0.05). Compared with open surgery, robot-assisted resection of limb osteoid osteomas has longer operation time, but the accuracy of lesion resection improve, intraoperative blood loss reduce, and early postoperative pain is lighter. It has the advantages of precision and minimally invasive surgery.

Association between Preoperative Blood Glucose Level and Hospital Length of Stay for Head and Neck Cancer Patients Undergoing Tumor Resection, Neck Dissection and Free Flap Reconstruction

Association between Preoperative Blood Glucose Level and Hospital Length of Stay for Head and Neck Cancer Patients Undergoing Tumor Resection, Neck Dissection and Free Flap Reconstruction

Salivary gland carcinomas in children and adolescents: A retrospective analysis of the European Cooperative Study Group for Pediatric Rare Tumours (EXPeRT)

BackgroundSalivary gland carcinomas (SGCs) are exceedingly rare in children, with a reported annual incidence of 0.8–1.4/1000,000 under 20 years of age. Evidence regarding optimal treatment of pediatric SGCs is limited, and for a long time, no guidelines have been available. Here, we report on an international retrospective series of SGCs in children and adolescents collected by several national rare tumor study groups cooperating in the European Cooperative Study Group of Pediatric Rare Tumors (EXPeRT) Patients and methodsPatients diagnosed between 2000 and 2014 were included. Data were reviewed by the respective national rare tumor working groups and reported on a harmonized data sheet to EXPeRT for central analysis. ResultsOverall, 121 patients were identified, including 103 patients with parotid tumors, 12 with submandibular tumors and six tumors in minor glands. In 11 patients, SGCs were secondary cancers. Mucoepidermoid carcinoma was the most frequent diagnosis (n = 65), followed by acinic cell carcinoma (n = 39), adenocystic carcinoma (n = 7), sialoblastoma (n = 3) and other carcinomas (n = 7). All patients underwent tumor resection (R0: 66%, R1: 34%). Neck dissection was performed in 47 patients, revealing nodal metastases in 13. Twenty-four patients underwent irradiation, and 11 patients received adjuvant chemotherapy. During a median follow-up of 25 (6–140 months), 14 relapses were observed (7 local, 5 with nodal and 2 with distant metastases). Five patients died of disease. Higher histological tumor grade was associated with advanced local tumor stage and risk of recurrence. ConclusionsSGCs in children and adolescents mostly present as localized tumors with low malignant potential. In approximately 10% of patients, regional lymph node metastases present at diagnosis. After complete resection, prognosis is favorable. Surgery is the mainstay of treatment; adjuvant local or cervical irradiation should be reserved to those rare patients with nodal metastases or less favorable biology such as adenocystic carcinoma.

QOL-28. THE LIVED EXPERIENCE OF PATIENTS WITH CHORDOMA – A RETROSPECTIVE CASE SERIES

Abstract BACKGROUND Chordoma is a rare malignant tumor arising from the skull base or spine with limited treatment options and poor prognosis. Patients with chordoma experience significant physical and emotional symptoms deleterious to quality of life (QOL). Current literature detailing the experiences of patients with chordoma, including end of life, is limited. Each patient’s course differs depending on tumor location, lesion size, metastatic nature of disease, and treatments. We sought to better understand the lived journey of the chordoma patients seen in our center. METHODS This was a retrospective chart review that evaluated a cohort of chordoma patients seen at our center from March 2017 to May 2023. RESULTS/ CONCLUSION A total of 18 patients were included. Average patient age at diagnosis was 53.3 years old (range: 23 to 87 years). Majority were female (67%) and 78% were White/Caucasian. Clival tumors were most common (55%), followed by spine (sacral (28%) and cervical (17%)). Nearly all tumors were recurrent (94%), almost half were metastatic (44%). All patients underwent tumor resection; the average number of surgeries underwent per patient was 2.7. Fifteen patients received radiation (83%) and sixteen patients participated in at least one clinical trial (88%). The average Karnofsky Performance Scale (KPS) at the initial outpatient visit was 80, which decreased to 72.2 by last outpatient visit. Most reported symptoms included emotional distress (78%), neuropathic pain (72%), muscular and bone pain (56%), vision changes (44%), dysphagia (39%), and headaches (39%). The average survival from diagnosis was 3.7 years (range: 2 to 23 years). Eight patients (45%) have passed, 5 of whom were enrolled on hospice at the time of death. Causes of death included seizures (1), respiratory failure due to tumor progression (3), bowel ischemia (1), medical aid in dying (1) and failure to thrive (1).

EXTH-33. RAGE INHIBITOR (TTP488) AS AN ALTERNATIVE TO DEXAMETHASONE FOR MANAGING CEREBRAL EDEMA FOLLOWING BRAIN TUMOR SURGERY

Abstract BACKGROUND Cerebral edema (CE) commonly occurs after neurosurgical procedures and contributes to patient morbidity and neurological deterioration. Corticosteroids alleviate brain edema during the perioperative period, but they impose several undesirable side effects and interfere with immunotherapies in patients with malignant brain tumors. OBJECTIVE To assess the anti-inflammatory effects of TTP488 (inhibitor of receptor for advanced glycation end products) on CE formation following tumor resection in glioma models. METHODS Mice harboring orthotopic CT-2A gliomas were randomly assigned to three groups and underwent tumor resection. TTP488, dexamethasone, and vehicle were administered perioperatively (day -4 pre-op to day 7 post-op) and post-operative neurological function was examined. CE was assessed on serial brain MRIs over a 7-day period, and using manual segmentation techniques, tumor-related volumes were calculated. In a separate survival experiment, the effect of each drug on anti-PD-1 immunotherapy response was measured. RESULTS In each group, CE peaked on post-operative day 2 and gradually diminished by day 7. On post-operative day one, mice treated with TTP488 showed a marked reduction in CE compared to those treated with either dexamethasone or vehicle with mean CE volumes of 1.75±1.08%, 2.69±0.77%, and 3.87±1.07%, respectively (P=0.02, TTP488 vs vehicle). Furthermore, the TTP488 group had better functional recovery scores (P=0.04) and wound healing (dehiscence, P=0.00003) compared to the vehicle group. Interestingly, unlike dexamethasone, TTP488 did not abrogate the efficacy of immunotherapy in the CT-2A glioma model. CONCLUSION TTP488 was as effective as dexamethasone in alleviating CE caused by tumor resection and did not interfere with the efficacy of immunotherapy. TTP488 could potentially be an alternative to dexamethasone in the perioperative management of patients undergoing tumor resection or other neurosurgical interventions.

Anastomosing haemangioma of the mediastinum: Clinicopathological series with radiological and genetic characterisation.

Anastomosing haemangiomas are benign tumours with anastomosing vascular channels that may mimic angiosarcoma. While anastomosing haemangiomas have been described in diverse locations, particularly the abdominal/paraspinal region, data on anastomosing haemangiomas in the mediastinum remain limited. We report the clinicopathological, radiological and molecular characteristics of the largest single-institutional series of mediastinal anastomosing haemangiomas. In our pathology archives in 2011-23, we reviewed all vascular lesions involving the mediastinum and identified seven anastomosing haemangiomas. Clinical information was abstracted from medical charts; available radiological imaging was reviewed. Targeted DNA-based next-generation sequencing (447 genes, including GNAQ and GNA11) was performed on five cases. The seven patients included five women and two men, with an age range of 55-77 (median = 72) years. Of the six tumours with available radiology, two each were in the prevascular, visceral and paravertebral mediastinum, with lobulated peripheral enhancement in all tumours examined with contrast enhancement. Six patients underwent tumour resection; one patient received proton radiotherapy. Microscopically, each tumour was solitary and characterised by anastomosing capillary-sized vessels lined by hobnail endothelial cells. Fibrin microthrombi, hyaline globules and extramedullary haematopoiesis were common. In the five tumours analysed by next-generation sequencing, GNAQ p.Q209P was identified in one tumour; no additional reportable alterations were identified in the remaining cases. No recurrence was noted in the four patients with available follow-up of 3-58 (median = 9.5) months after resection. While mediastinal anastomosing haemangiomas can microscopically mimic angiosarcoma, awareness of this entity and radiological correlation may help to circumvent this diagnostic pitfall.

Role of amide proton transfer imaging in maximizing tumor resection in malignant glioma: a possibility to take the place of 11C-methionine positron emission tomography.

Amide proton transfer (APT) imaging has been proposed as a technique to assess tumor metabolism. However, the relationship between APT imaging and other quantitative modalities including positron emission tomography (PET) has not been investigated in detail. This study aimed to evaluate the clinical usefulness of APT imaging in determining the metabolic status of malignant glioma and to compare findings with those from 11C-methionine (Met)-PET. This research analyzed APT imaging data from 20 consecutive patients with malignant glioma treated between January 2022 and July 2023. Patients underwent tumor resection and correlations between tumor activity and intensity of APT signal were investigated. We also compared 11C-Met-PET and APT imaging for the same regions of the perifocal tumor invasion area. Clear, diagnostic APT images were obtained from all 20 cases. Mean APT intensity (APTmean) was significantly higher in the glioblastoma (GBM), IDH wild type group (27.2 ± 12.8%) than in other gliomas (6.0 ± 4.7%; p < 0.001). The cut-off APTmean to optimally distinguish between GBM and other malignant gliomas was 12.8%, offering 100% sensitivity and 83.3% specificity. These values for APTmean broadly matched the tumor-to-contralateral normal brain tissue ratio from 11C-Met-PET analysis (r = 0.66). The APT signal was also observed in the gadolinium non-contrast region on T1-weighted imaging, appearing to reflect the surrounding tumor-infiltrated area. APT imaging can be used to evaluate the area of tumor invasion, similar to 11C-Met-PET. APT imaging revealed low invasiveness in patients and was useful in preoperative planning for tumor resection, facilitating maximum tumor resection including the tumor invasive area.

Leiomyoma of the Trachea: A Rare Tracheal Tumor

This is a case of a rare tracheal tumor, in a 45year old male farmer who presented with recurrent dyspnea for four years, initially misdiagnosed as asthma. The patient experienced worsening symptoms, including cough, hemoptysis, weight loss, and respiratory failure. Imaging and bronchoscopy revealed a tracheal mass, later identified as leiomyoma. The patient underwent tumor resection via rigid bronchoscopy, resulting in successful removal and tracheal recanalization. Postoperatively, the patient showed improvement, and follow-up examinations confirmed resolution of symptoms and absence of tumors, such as leiomyoma, are rare, often causing airway obstructions. Treatment approaches vary, including surgical resection and endoscopic techniques. In the case of wide-based tumors, surgical intervention is recommended to reduce recurrence risks. Anesthesia management is crucial due to potential airway compromise during the procedure. Although recurrence rates for leiomyoma are unknown, incomplete bronchoscopic resection has been associated with reoccurrence, necessitating surgery and carinal reconstruction.

First clinical experience with fractionated intracavitary radioimmunotherapy using [177Lu]Lu-6A10-Fab fragments in patients with glioblastoma: a pilot study

BackgroundFollowing resection and standard adjuvant radio- and chemotherapy, approved maintenance therapies for glioblastoma are lacking. Intracavitary radioimmunotherapy (iRIT) with 177Lu-labeled 6A10-Fab fragments targeting tumor-associated carbonic anhydrase XII and injected into the resection cavity offers a novel and promising strategy for improved tumor control.MethodsThree glioblastoma patients underwent tumor resection followed by standard radio- and chemotherapy. These patients with stable disease following completion of standard therapy underwent iRIT on compassionate grounds. After surgical implantation of a subcutaneous injection reservoir with a catheter into the resection cavity, a leakage test with [99mTc]Tc-DTPA was performed to rule out leakage into other cerebral compartments. IRIT comprised three consecutive applications over three months for each patient, with 25%, 50%, 25% of the total activity injected. A dosimetry protocol was included with blood sampling and SPECT/CT of the abdomen to calculate doses for the bone marrow and kidneys as potential organs at risk.ResultsAll three patients presented without relevant leakage after application of [99mTc]Tc-DTPA. Two patients underwent three full cycles of iRIT (592 MBq and 1228 MBq total activity). One patient showed histologically proven tumor progression after the second cycle (526 MBq total activity). No relevant therapy-associated toxicities or adverse events were observed. Dosimetry did not reveal absorbed doses above upper dose limits for organs at risk.ConclusionsIn first individual cases, iRIT with [177Lu]Lu-6A10-Fab appears to be feasible and safe, without therapy-related side effects. A confirmatory multicenter phase-I-trial was recently opened and is currently recruiting.

Goldilocks principle of minimally invasive surgery for gastric subepithelial tumors.

Minimally invasive surgery had been tailored to individual cases of gastric subepithelial tumors (SETs) after comparing the clinical outcomes of endoscopic resection (ER), laparoscopic resection (LR), and hybrid methods. To study the use of Goldilocks principle to determine the best form of minimally invasive surgery for gastric SETs. In this retrospective study, 194 patients of gastric SETs with high probability of surgical intervention were included. All patients underwent tumor resection in the operating theater between January 2013 and December 2021. The patients were divided into two groups, ER or LR, according to the tumor characteristics and the initial intent of intervention. Few patients in the ER group required further backup laparoscopic surgery after an incomplete ER. The patients who had converted open surgery were excluded. A logistic regression model was used to assess the associations between patient characteristics and the likelihood of a treatment strategy. The area under the curve was used to assess the discriminative ability of tumor size and Youden's index to determine the optimal cut-off tumor size. One-hundred ninety-four patients (100 in the ER group and 94 in the LR group) underwent tumor resection in the operating theater. In the ER group, 27 patients required backup laparoscopic surgery after an incomplete ER. The patients in the ER group had small tumor sizes and shorter procedure durations while the patients in the LR group had large tumor sizes, exophytic growth, malignancy, and tumors that were more often located in the middle or lower third of the stomach. Both groups had similar durations of hospital stays and a similar rate of major postoperative complications. The patients in the ER group who underwent backup surgery required longer procedures (56.4 min) and prolonged stays (2 d) compared to the patients in the LR group without the increased rate of major postoperative complications. The optimal cut-off point for the tumor size for laparoscopic surgery was 2.15 cm. Multidisciplinary teamwork leads to the adoption of different strategies to yield efficient clinical outcomes according to the tumor characteristics.

Comparison of the clinical effects of lamina replantation and screw fixation after laminectomy in the treatment of intraspinal tumours

IntroductionIntraspinal tumours are common diseases in neurosurgery and spinal surgery. Due to the fact that most of them are benign tumours, surgical resection is usually effective, and it is also the main treatment for these tumours. To maintain the stability of the spine and to reduce the incidence of kyphosis, pedicle screw fixation is required after traditional laminectomy, but there are many complications. In recent years, tumour resection and laminectomy have become increasingly favoured by clinicians. However, the comparison of the clinical effects of lamina complex replantation and pedicle screw fixation after laminectomy in the treatment of intraspinal tumours is still unknown. This paper systematically compared the two methods from many aspects and discussed their advantages and disadvantages to obtain better clinical guidance.Materials and methodsIn this study, a retrospective analysis was conducted to select 58 patients who underwent posterior approach tumour resection in the spinal surgery department of our hospital from January 2017 to January 2020. Among them, 32 patients underwent tumour resection and laminoplasty, and 26 patients underwent tumour resection and screw internal fixation. The age, sex, body mass index (BMI), smoking status, duration of symptoms, operation time, length of hospital stay, postoperative complications, amount of bleeding and other data were summarized, calculated and compared.Results1. The age, sex, BMI, smoking status and symptom duration of the two groups were compared. The abovementioned results were not statistically significant. 2. The operation time, hospital stay, postoperative complications, intraoperative bleeding and adjacent segment degeneration (ASD) were counted and compared between the two groups. There was no significant difference in hospital stay or intraoperative bleeding between the two groups; in addition, the operation time, postoperative complications and incidence of ASD were statistically significant. 3. The visual analog scale (VAS) score, Oswestry Disability Index (ODI) score of thoracic and lumbar spines and Neck Disability Index (NDI) score of cervical spine patients in the two groups were counted, and the preoperative and postoperative data, as well as their changes, were counted and compared between groups and within groups. There was no statistical significance between the two groups; moreover, the postoperative scores were all significantly lower than preoperative in the group. 4. According to the spinal cord function ASIA grade, the preoperative, final follow-up and change values of the two groups were counted, and intragroup and intergroup comparisons were made. There was no significant difference between the two groups; in addition, the scores of the final follow-up were significantly higher than preoperative in the group. 5. The spinal mobility was measured and recorded before the operation and at the final follow-up. There was no significant difference between preoperative and postoperative cervical mobility, and there was no statistical significance observed; furthermore, the range of flexion, extension, rotation and lateral bending of the thoracic and lumbar spines in the screw fixation group was significantly lower than that in the lamina replantation group.ConclusionsLamina replantation can be used as splendid methods for the treatment of Intraspinal tumour. Lamina replantation can reduce the operation time, as well as reduce the occurrence of postoperative cerebrospinal fluid leakage, iatrogenic spinal stenosis, posterior soft tissue adhesion and ASD. These complications are reduced in comparison to the other mode of management and better preserve the mobility of the spine.