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Strict regulation of type I interferons (IFN) is vital for balancing tissue damage and immunity against infections. We previously found that during Kaposi's sarcoma-associated herpesvirus infection, IFN induction was limited to a small percentage of infected B cells. This heterogeneity was not explained by viral gene expression.
View Article and Find Full Text PDFThe size of local recurrence influences outcomes in chondrosarcoma: Significant impact observed in grade 2 tumours.
J Clin Orthop Trauma
January 2025
Royal Orthopaedic Hospital, Birmingham and Aston University Medical School, Aston University, Birmingham, B4 7ET, UK.
Background: Chondrosarcoma is the second most common bone malignancy. Chondrosarcoma is considered a surgical disease, and the role of surgical margin is important since local recurrence is known to decrease survival. The aim of this study was to investigate the timing of local recurrence and the size of local recurrence in post local recurrence survival in chondrosarcoma.
View Article and Find Full Text PDFHigh-Grade Sarcomatous Transformation of Hybrid Hemosiderotic Fibrolipomatous Tumor-Myxoinflammatory Fibroblastic Sarcoma with Novel Gene Fusion.
Int J Surg Pathol
January 2025
Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA.
Hemosiderotic fibrolipomatous tumor (HFLT) and myxoinflammatory fibroblastic sarcoma (MIFS) are rare, locally aggressive soft tissue tumors with a predilection for distal extremities of middle-aged adults. Hybrid tumors (HFLT-MIFS) demonstrate overlapping features of both and share recurrent translocation (1;10) (p22; q24). We describe a tumor with high-grade sarcomatous transformation of a hybrid HFLT-MIFS, with a novel gene fusion, presenting as a right foot soft tissue mass in an 85-year-old woman.
View Article and Find Full Text PDFAssessing the Utility of DNA Methylation Profiling in the Classification of Myogenic Sarcomas of Bone.
Int J Surg Pathol
January 2025
Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA.
The diagnosis of primary leiomyosarcoma (LMS) of bone is generally established based on integrative findings of morphologic features, immunohistochemical staining, and clinical and radiological findings. There are no specific genetic alterations that can be used to confirm the diagnosis of LMS in challenging diagnoses of bone sarcomas with myogenic differentiation. In this study, we assessed the utility of a DNA methylation-based classifier as an ancillary diagnostic tool for subclassifying bone sarcomas with myogenic differentiation.
View Article and Find Full Text PDFPrimary Intracranial Sarcoma, DICER1-Mutant, With Prominent Chondroid Differentiation: Case Report and Summary of Reported Patients in Literature.
Int J Surg Pathol
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Department of Pathology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA.
Primary intracranial sarcoma, -mutant, included as a new diagnostic entity in the 2021 WHO Classification of Central Nervous System Tumors, is a rare, but aggressive neoplasm generally identified in the supratentorial forebrain. The prognostic implications of these uncommon tumors and optimal treatment strategy remain unclear. A 19-year-old woman was found unresponsive after reporting a severe headache.
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