Biopsy Of Soft Tissue Tumors Research Articles

Soft tissue sarcomas: Disease burden and health system response in Peru.

e23557 Background: The management of soft tissue sarcomas (STS) presents a challenge in Peru, with a fragmented health system and few centers specialized in sarcoma care. There is no national cancer registry, which does not allow us to have a real view of the most prevalent types. Our aim was to determine the incidence in Instituto Nacional de Enfermedades Neoplásicas (INEN) and to know the real care capacity of cancer centers nationwide. Methods: A retrospective study was carried out in INEN between 2009 and 2015 to know the incidence of STS. Also, a survey was carried out to determine the real capacity of diagnosis and treatment care of cancer centers located in different regions of our country. Results: We were able to determine the anatomopathological diagnosis in 1804 (100%) patients. 52,1% were male (n = 899). Median age was 43 years (15-96). The most frequent sarcoma was undifferentiated pleomorphic sarcoma with 482 patients(27.9%), followed by liposarcoma in 269 (15,6%) and leiomyosarcoma in 159 (9%). The most common primary location was the limbs with 892 patients (51.7%), followed by the abdomen and pelvis with 423 (24.5%), and the least common was the head and neck with 207 patients (12%), followed immediately by the thorax with 205 patients (11.9%). According to the region of origin, 551 (31.9%) patients came from the northern region, 175 (10.1%) from the south, 35 (2%) from the east, 308 (17.8%) from the central region, and 658 (38.1%) from Lima and Callao. We obtained responses from 20 oncology centers of the Ministry of Health along 12 regions operating nationwide. Eight (40%) oncology centers are located in Lima and twelve (60%) in the rest of Peru. 100% (n = 20) of centers have medical oncologists, 70% (n = 14) have surgical oncologists, 65% (n = 13) have traumatologist and pathologist. About capacity of resolution: 100% (n = 20) perform direct biopsy of soft tissue tumors and 60% (n = 12) perform image-guided biopsies; regarding pathology, 95% (n = 19) performed morphological approach and 45% (n = 9) immunohistochemistry studies. 100% (n = 20) can perform ultrasound studies, 95% (n = 19) tomography, and 35% (n = 7) magnetic resonance imaging. 90% (n = 17) accomplish radical surgeries and 60% (n = 12) limb sparing surgeries. 85% (n = 17) enforce chemotherapy treatment. Only 50% (n = 10) have a radiotherapy service. 25% (n = 5) hold multidisciplinary meetings continuously while 40% (n = 8) hold them occasionally for complex cases. Only 8 oncology centers (out of a total of 20) have all the services to care for the complexity of a patient with soft tissue sarcoma, the majority (n = 3) located in Lima. Conclusions: Nearly 1,800 patients have been diagnosed in this reference institution in a period of 5 years, however it represents an underestimation of the real incidence. Cancer centers that can provide complete care for patients with soft tissue sarcomas are scarce, creating a gap in care for this pathology.

Accuracy and Safety of Ultrasound-Guided Core Needle Biopsy of Soft Tissue Tumors in an Outpatient Setting: A Sarcoma Center Analysis of 392 Consecutive Patients

Simple SummaryIn patients with unclear soft tissue lesions, treatment planning largely depends on histology. Core needle biopsy is the diagnostic standard in these cases. The aim of this retrospective study was to investigate accuracy and safety of ultrasound guided core needle biopsy at a tertiary referral center. We show that ultrasound guided biopsy was feasible as a one stop shop procedure in an outpatient setting in 87.6% of the cases. The rate of conclusive biopsies was 88.5%. After surgical resection, the dignity, tumor type and histopathological grading of the biopsy matched one of the resection specimens in 97.2%, 92.7% and 92.5% of the cases, respectively. Major complications occurred in 0.8% of the cases. With this study, we confirm that ultrasound guided core needle biopsy is safe, effective and can be performed at the first outpatient presentation to speed up the diagnostic and therapeutic cascade in sarcoma patients.Background: The aim of this study was to investigate diagnostic accuracy, safety and histologic results of ultrasound guided core needle biopsy (CNB) in patients with soft tissue lesions (STL) at a tertiary referral center. Methods: A retrospective analysis of all consecutive patients undergoing ultrasound guided CNB for STL at our sarcoma outpatient service between January 2015 and August 2020 was performed. Results: A total of 392 patients were identified. Main histologic entities were sarcomas, lipomas and desmoid tumors. Biopsy was performed in an outpatient setting in 87.6% of the cases. Conclusive biopsies were obtained in 88.5% of the cases. In patients who underwent surgical resection after CNB, the concordance of dignity, tumor entity and histopathological grading between biopsy and resection specimen were 97.2%, 92.7% and 92.5% respectively. The risk of inconclusive CNB was highest in intraabdominal or retroperitoneal tumors (19.5%) and lowest in lesions at the lower extremity (4.4%). Major complications after CNB occurred in three cases (0.8%). No case of biopsy tract seeding was observed during the study period. Conclusions: Ultrasound guided CNB for STL at first presentation in a dedicated surgical outpatient setting is a safe procedure and yields a high diagnostic accuracy.

Histoséminaire « Microbiopsie des tumeurs des tissus mous »

Histoséminaire « Microbiopsie des tumeurs des tissus mous »

High diagnostic accuracy of core needle biopsy of soft tissue tumors: An institutional experience.

Core needle biopsy (CNB) has been suboptimal in the subclassification and grading of mesenchymal tumors. Recent advances in molecular diagnostics have shown promise in improving this area. The institutional experience with CNBs of soft tissue lesions on cytology cases and correlated histologic follow-up has been evaluated. It also addressed the advantageous use of ancillary techniques, including immunohistochemistry and molecular studies. Archived cytologic CNB material and reports of patients with soft tissue lesions were retrieved and CNB results with final resection results were compared. Cases were re-reviewed and data were analyzed with descriptive statistics. From archived data, 215 cases were extracted of 99 female and 116 male patients (mean [range] age, 59.9 [12-95] years). Categories were malignant (n = 157), suspicious (n = 16), and benign (n = 42). In total, 161 (74.9%) had subsequent surgical resection-130 were malignant; 8, suspicious; and 23, benign. Of the malignant or suspicious cases, 138 had follow-up histologic resections, with 97.9% concordance. The most common malignant tumor was liposarcoma (n = 41; 29.7%), followed by undifferentiated pleomorphic sarcoma (30; 21.7%). Of benign tumors, 23 (54.8%) had follow-up surgical resection. Low-grade gastrointestinal stromal tumor was the most common benign tumor (26.1%), followed by fibromatosis (21.7%). Cytohistologic correlation for all categories showed 96.9% concordance. Molecular ancillary studies correctly classified malignant tumors in 37 (26.8%) of the 138 cases. CNB is a reliable modality for evaluating soft tissue neoplasms, with high histologic concordance rate.

The role of sonoelastography in planning percutaneous biopsy of soft tissue tumours.

The aim of this study was to evaluate whether compression elastography has a useful role in the planning of percutaneous ultrasound-guided biopsies of soft tissue tumours. Consecutive patients were evaluated in the sarcoma clinic after their initial imaging work-up, involving ultrasound and MR. The multi-disciplinary team decided when percutaneous biopsy for histology was required, and this was performed in the multi-disciplinary clinic using ultrasound guidance. An experienced sarcoma radiologist performed the ultrasound with compression elastography in all cases. Grey scale imaging was used to predict the needle track for each biopsy and routinely, two passes were made into each lesion. In this study, the track for the second pass was predicted from the elastogram, aiming for a stiff (blue) area within the lesion. The samples were separately potted in formalin and sent to the sarcoma pathologist. Pathology reports for each sample were assessed to evaluate whether the elastographic blue targets yielded any specific diagnostic quality; 157 biopsies were performed in separate patients, including two passes per patient as per routine protocol; 107 (68.1%) were benign lesions and 50 (31.9%) were malignancies. In the benign group, 16 (14.9%) showed significant blue areas in the lesion. However, nine of these were thought to be artefactual, as they showed grey scale characteristics of complex cysts. Positive histology was recorded in all the blue areas, but in the benign lesions positivity was not seen solely in the blue areas; 14 (28%) in the malignant group showed blue areas in the lesion and five biopsies were positive in blue areas only. Overall, the blue target yielded the only positive tissue in 10% of the malignancies, equating to 3% of the whole study population. The p value was 0.008829 for positive histology for malignancy from blue areas only.

Core needle biopsy of soft tissue tumors, CEUS vs US guided: a pilot study.

The purpose of this study was to evaluate the usefulness of contrast-enhanced ultrasonography (CEUS) in the bioptic sampling of soft tissue tumors (STT) compared with unenhanced ultrasonography alone. This is a prospective longitudinal study of 40 patients subjected to ultrasonography (US)-guided core needle biopsy (CNB) to characterize a suspected STT. Three series of bioptic samplings were carried out on each patient, respectively using unenhanced US alone and CEUS in both the areas of the tumor enhanced or not by the contrast medium. All bioptic samples underwent a histological evaluation and the results were analyzed by comparing the histology of the biopsy with the definitive diagnosis in 15 surgically excised samples. 27 (67.5%) of the 40 patients completed the entire study procedure; in 19 cases (70.3%) the three bioptic samplings gave unanimous results, also when compared to the surgical specimen; in seven cases (25.9%) use of CEUS allowed to obtain additional or more accurate information about the mass in question, compared to simple US guidance without contrast; in one patient (3.7%) sampling obtained using unenhanced ultrasonography guidance and in the areas enhanced by the contrast agent had precisely the same results of the surgical specimen. CEUS, due to its ability to evaluate microvascular areas, has proven to be a promising method in guiding bioptic sampling of soft tissue tumor, directing the needle to the most significant areas of the tumor. Given the small number of patients evaluated in our study, to achieve statistically significant results, it would be appropriate to obtain a larger sample size, since the very first results seem to be encouraging and to justify the increase of the population.

Use of diagnostic dynamic contrast-enhanced (DCE)-MRI for targeting of soft tissue tumour biopsies at 3T: preliminary results.

To test the feasibility and accuracy of MR-guided soft tissue tumour biopsy at 3T, using the dynamic contrast-enhanced (DCE) information from staging MRI for intralesional targeting. After obtaining written informed consent for this institutional review board-approved study, 53 patients with suspected soft tissue tumours prospectively underwent preoperative staging MRI at 3T, including DCE, and subsequent MR-guided core needle biopsy. In 44/53 cases, DCE was heterogeneous and was used for intralesional biopsy targeting. Surgical, whole-specimen histology was used as the gold standard in 43/44 patients and revealed 42 soft tissue tumours (24 men; 18 women; mean age, 52 years; range, 19 - 84). Final surgical histology revealed eight benign lesions, six tumours of intermediate dignity, and 28 malignancies. All malignancies had shown heterogeneous DCE. The diagnostic yield of the biopsies was 100% (42/42). Histological accuracy rates of biopsy were 100% in predicting the dignity (42/42; 95% CI [0.916 - 1.000]), 95.2% for the tissue-specific entity (40/42; 95% CI [0.847 - 0.987]), and 90.5% for the tumour grade (38/42; 95% CI [0.779 - 0.962]). Our preliminary study indicates that biopsy of soft tissue tumours can be performed accurately and safely with DCE targeted MR-guidance at 3T, using a combined staging/biopsy MRI protocol. • MR-guided soft tissue tumour biopsy using DCE for intralesional targeting is feasible. • Targeting by staging-MRI allows reliable planning of the biopsy approach. • The method seems accurate and safe as a combined staging/biopsy procedure in outpatients. • DCE-targeted biopsy seems useful in challenging large and heterogeneous tumours.

Sicherheit der Vakuumsaugbiopsie von dignitätsunklaren Weichgewebstumoren durch sonographische Unterstützung

Only the exact pretherapeutical, histopathological diagnosis of non-distinctive soft tissue tumours leads to adequate therapy. Next to the standardized incisional biopsy, current needle biopsy techniques are limited by the small size of the tissue samples and error rate. This study was performed to explore whether the ultrasound-guidance can support the vacuum-assisted biopsy of soft tissue tumors in technical safety. Between 2004-2006, 116 patients with non-distinctive soft tissue tumours underwent ultrasound-guided vacuum-assisted biopsy (uVAB). The results were compared to a cohorte with standardized incisional biopsy (IB). The procedure was successful in 115 patients (success rate: 99,1%). Rate of complications was 4,3% (n=5/116). This closed biopsy technique was performed as an outpatient procedure with local anaesthesia. Diagnosis by uVAB was comparable to the control group (concordance of entity in 94,7%, grading: 89,3%, sensitivity: 93,5%, specificity: 100%, accuracy: 96,2%). Ultrasound-guided the vacuum-assisted biopsy is a safe procedure for soft tissue tumors. The results of this minimal invasive method are comparable to open the gold-standardized incisional biopsy.

Preoperative core biopsy of soft-tissue tumours facilitates their surgical management: 10-year update: Reply

Preoperative core biopsy of soft-tissue tumours facilitates their surgical management: 10-year update: Reply

Can FDG PET be used to successfully direct preoperative biopsy of soft tissue tumours?

Magnetic resonance imaging (MRI) has been the most useful tool in the anatomical definition of soft tissue sarcoma, although there remains the problem of defining the lesions as benign or malignant. The management of such lesions requires biopsy prior to surgical resection. If the most malignant area could be defined more accurately, then this area could be targeted for biopsy. Fluorodeoxyglucose positron emission tomography (FDG PET) has been found to be useful in identifying malignancy and variations in grade in soft tissue masses. The aim of this study was to assess the use of FDG PET scanning with or without co-registered MRI to indicate the most appropriate biopsy site. Twenty consecutive patients presented with soft tissue masses with clinical signs of malignancy. All patients underwent MRI and FDG PET scanning and the two images were co-registered. A biopsy site that was the most likely to be malignant was defined on the PET scan. All patients underwent an initial biopsy and then complete surgical resection of the mass. The histological results from the mass were compared with those from the biopsy specimen obtained from the site suggested by the PET scan. In malignant masses the biopsy site suggested by the FDG PET scan was found to be representative of the most malignant site on the whole mass histology. Benign lesions had low or no FDG uptake. In no case did the co-registered image add significantly to the appropriate biopsy site. FDG PET can be used to appropriately direct biopsy in soft tissue sarcoma and potentially may lead to computed tomography/MRI directed outpatient biopsy prior to definitive treatment.

Ultrasonographically guided needle biopsy of benign and malignant soft tissue and bone tumors.

In 65 patients an ultrasonographically guided needle biopsy was performed for histologic diagnosis of benign and malignant soft tissue and bone tumors. On the basis of the histopathologic findings, a final diagnosis could be made in 54 cases after sonographically guided needle biopsy of the soft tissue tumor component. In addition, tumor grouping was possible in seven cases; however, due to the small volume of the biopsy specimen, further tumor differentiation proved to be unsuccessful. A definite diagnosis was not possible in four patients, who had mainly cystoid tumors; however, malignancy could be ruled out in three of these cases. The decisive advantage of the ultrasonographically guided needle biopsy procedure over what is known as a blind tumor biopsy is that the biopsy needle can be positioned exactly by means of imaging control. The ultrasound screen enables the user to monitor the biopsy procedure; multiple biopsies of different parts of the tumor soft tissue component can be performed using a single needle tract. No complications occurred in our study. Because of the far-reaching consequences of ultrasonographically guided needle biopsy, this type of procedure should be performed only at tumor centers.

Percutaneous Biopsy of Primary Soft Tissue Tumors

This article reviews the technique, results, and complications of percutaneous biopsies of soft tissue tumors. Biopsy of soft tissue tumors may be achieved either with fine needles or core-biopsy needles. The choice between the two biopsy techniques ultimately depends on the experience of the radiologist and pathologist. Since an inadequate technique may severely affect final treatment, the biopsy track should be discussed with the surgeon responsible for future management each time a primary tumor is suspected.

The Usefulness and Problem in Needle Biopsy of Soft Tissue Tumors

The Usefulness and Problem in Needle Biopsy of Soft Tissue Tumors

Biopsy of Soft-Tissue Tumors

Biopsy is an integral part of the overall management of patients with soft-tissue sarcoma. The types of biopsy are fine needle, trocar, open incision or en bloc excision. There are advantages and disadvantages of each. Open biopsy requires strict adherence to a number of surgical principles. Proper execution requires determination of appropriate biopsy site, meticulous technique, and close collaboration with an experienced pathologist. Failure to adhere to these principles may result in untoward consequences for patients.

Percutaneous needle biopsy of soft tissue tumors guided by ultrasound and computed tomography.

Ultrasound and computed tomography (CT) guided percutaneous needle biopsy of soft tissue lesions was performed in 39 patients. A correct diagnosis was obtained in 35 of 42 biopsies, with an overall accuracy rate of 83%. No false-positive diagnoses were obtained, and no complications related to the procedure were encountered. The value of this technique in the management of selected patients with soft tissue masses is detailed.