Potential benefits of neoadjuvant radiotherapy prior to "en bloc" compartmental resection of pure retroperitoneal liposarcomas.

Retroperitoneal liposarcomas(RPL) are rare malignant tumors, accounting for approximately 15% of soft tissue sarcomas and 0.07-0.2% of all cancers.

Acute Tracheal Obstruction Secondary to Cervical Liposarcoma Metastasis.

Tracheal obstruction can arise from multiple conditions, including chronic obstructive pulmonary disease, asthma, foreign bodies, tumors, and acute heart failure. We report a case of a 43-year-old man with cervical liposarcoma who, following surgical excision, chemotherapy, and radiation, presented with severe dyspnea and was admitted to our hospital. A CT scan detected an endotracheal mass causing significant obstruction, suspected to be malignant.

BRCA2 germline mutation carrier with five malignancies: a case report.

Background: BRCA2 germline mutations are known to predispose carriers to various cancer types, including breast, ovarian, pancreatic and prostate cancer. An association with melanoma has also been reported. However, the full tumour spectrum associated with BRCA2 mutations, particularly in patients with other concurrent pathogenetic mutations, is unexplored.

Retroperitoneal leiomyosarcoma diagnosis and management in a chronic kidney disease context: A case report.

Introduction And Importance: While the treatment approach for sarcomas seems straightforward and well-defined, we often encounter several diagnostic or therapeutic challenges in clinical practice. This article presents a case of retroperitoneal leiomyosarcoma in a patient with chronic kidney disease, highlighting the complexity of managing such cases.

Case Report: A 63-year-old woman with a history of chronic kidney disease presented with a progressively enlarging mass in her right flank.

Heterogeneity in response to neoadjuvant radiotherapy between soft tissue sarcoma histotypes: associations between radiology and pathology findings.

Objective: To investigate imaging biomarkers of tumour response by describing changes in imaging and pathology findings after neoadjuvant radiotherapy (nRT) and exploring their correlations.

Materials And Methods: Tumour diameter, volume, and tumour-to-muscle signal intensity (SI) ratio were collected before and after radiotherapy in a cohort of 107 patients with intermediate/high-grade STS and were correlated with post-radiotherapy pathology findings (percentage of necrosis, viable cells, and fibrosis) using Spearman Rank test. Pathological complete response (pCR) was defined as no residual viable cells present, whereas the presence of < 10% viable cells was defined as near-complete pathologic response (near-pCR).

Histologic and immunologic factors associated with response to immune checkpoint inhibitors in advanced sarcoma.

Purpose: To characterize factors associated with response to immune checkpoint inhibitors (ICIs) in advanced sarcoma.

Experimental Design: This is a retrospective study with a cohort of 216 patients with advanced sarcoma treated with ICIs between 2016-2023 at Stanford Health Care. Overall survival (OS), progression free survival (PFS), objective response rates per RECIST criteria (ORR), and reason for ICI discontinuation were analyzed across histologic subtypes, ICI regimens, tumor mutational burden (TMB), and PD-L1 expression.

Total retroperitoneal lipectomy improves prognosis in patients with primary retroperitoneal liposarcoma: a comparative study.

Background: Retroperitoneal liposarcoma (RPLS) is the most common soft tissue sarcoma originating in the retroperitoneal space. Although surgery is the standard treatment, recurrence remains frequent. In this study, we aimed to explore the safety and efficacy of total (ipsilateral) retroperitoneal lipectomy (TRL) compared to traditional complete resection (CR) for primary RPLS.

Integrated lipidomics and RNA-seq reveal prognostic biomarkers in well-differentiated and dedifferentiated retroperitoneal liposarcoma.

Background: Retroperitoneal liposarcoma (RLPS) is a mesenchymal malignant tumor characterized by different degrees of adipocytic differentiation. Well-differentiated liposarcoma (WDLPS) and dedifferentiated liposarcoma (DDLPS) are two of the most common subtypes of RLPS, exhibiting clear differences in biological behaviors and clinical prognosis. The metabolic features and genomic characteristics remain unclear.

Extracorporeal Membrane Oxygenation With Robotic-Assisted Thoracic Surgery for Treatment of Giant Mediastinal Liposarcoma.

A 61-year-old woman presented to our team with giant mediastinal liposarcoma causing compression of the esophagus, bronchus, and left atrium. Given the patient's advanced presentation and reduced cardiac reserve, rescue venoarterial extracorporeal membrane oxygenation was used in addition to standard robotic-assisted thoracic surgery for mass resection.

Upper Extremity Dedifferentiated Liposarcoma With an Osseus Component: An Uncommon Pathology.

Liposarcomas are the most common soft tissue sarcoma primarily originating in deep soft tissues and the retroperitoneum. Sarcoma classification includes atypical lipomatous tumor/well-differentiated liposarcoma (WDL) and dedifferentiated liposarcoma (DDL), myxoid liposarcoma, and pleomorphic liposarcoma. DDL is most prevalent in the retroperitoneum and often has two distinct components, a well-differentiated lipomatous component and a dedifferentiated nonlipomatous component that could be morphologically similar to malignant fibrous histiocytoma (MFH) or fibrosarcoma.

The Impact of Perioperative Radiotherapy on Disease-Specific Survival in Patients with Localized Retroperitoneal Liposarcoma: A Population-Based Propensity-Score Matched Analysis.

Background: The impact of radiotherapy on the oncologic outcome of retroperitoneal liposarcoma (RPLS) remains controversial. The aim of this study was to evaluate the effect of radiotherapy on disease-specific survival (DSS) in a cohort of patients with RPLSs.

Methods: In this population-based, retrospective cohort study, patients with localized RPLSs who underwent surgical therapy were identified from the Surveillance, Epidemiology, and End Results-17 cancer registry program.

Targeted transcriptomic analysis of well-differentiated and dedifferentiated liposarcoma reveals multiple dysregulated pathways including glucose metabolism, TGF-β, and HIF-1 signaling.

Liposarcoma is the most prevalent sarcoma in adults representing 20% of all sarcomas with well-differentiated/dedifferentiated among the most common subtypes represented. Despite multimodality treatment approaches, there has not been any appreciable change in survival benefit in the past 10 years. The future of targeted therapy for WD/DDLPS is promising with the intention to spare multi-visceral removal due to radical surgical resection.

Unusual hand tumor: A case report.

Adipose tumors are dominated by lipomas, but other rarer entities may be encountered such as hibernoma which is a benign tumor that develops from brown fat. The thigh is the preferred location for hibernomas, but the tumor can appear in other areas. The upper limb is a rare localization and there is only 1 case of hibernoma on the hand already reported in the English literature.

Tumor-infiltrating lymphocytes vary in different canine soft tissue sarcoma histological types.

Soft tissue sarcomas (STSs) are conventionally viewed as poorly immunogenic tumors; however, some human STSs have recently been reported to elicit an immune response, thus representing potential candidates for immunotherapy. Data regarding immune cell infiltrates in canine STSs are limited and reported without tumor-type stratification. The aim of this study was to retrospectively assess tumor-infiltrating lymphocytes (TILs) in canine STSs of 5 different histotypes.

Sarcoma: Last Year's Practice Changing Papers.

Background: In 2023 and 2024, a wide variety of new studies have been published in the field of soft tissue sarcomas, representing the enormous heterogeneity of sarcoma histotypes, anatomical location, treatment variability, and biological behavior.

Patients And Methods: This article summarizes the, in our view, seven most important publications in the field that will have an impact on the surgical practice and future treatment strategies of our patients.

Results: In the last year, we gained more insight in the genetic background of patients with sarcoma from a large Australian study, which will have an impact on future counseling and screening of our patients.

Primary dedifferentiated liposarcoma of the gallbladder: a case report and literature review.

Background: Liposarcoma (LPS) is a kind of malignancy of soft tissue usually found in the retroperitoneal, limb, or neck region, and some may be detected with delayed symptoms (pain or palpable mass), and less frequently occurs in organs of the digestive system. In contrast, Dedifferentiated liposarcoma (DDLPS) is a common histological subtype of LPS. The present study reported a case of dedifferentiated liposarcoma originating in the gallbladder.

Comparing epidemiological and clinical data from RPS patients documented in a German cancer registry to a cohort from TARPSWG reference centres.

Purpose: Retroperitoneal sarcomas (RPS) are rare, heterogeneous tumours. Treatment recommendations are mainly derived from cohorts treated at reference centres. The applicability of data from cancer registries (CR) is controversial.

Undifferentiated spindle cell sarcoma at the anastomosis after ileocecal resection for colon cancer: A case report.

Introduction: Spindle cell sarcoma (SCS) is a sarcoma subtype rarely described in the abdominal cavity, and with a worse prognosis compared with that at other sites. We report a case of SCS occurring at the anastomosis after ileal resection for colorectal cancer.

Presentation Of Case: An 86-year-old woman with a chief complaint of abdominal pain had undergone ileal resection, D2 dissection, and hand-sewn anastomosis in 2011 to treat papillary stage I adenocarcinoma.