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Atypical Presentation of Spindle Cell Lipoma in a Young Male with a History of Malignant Melanoma.
Dermatopathology (Basel)
November 2024
Department of Dermatology, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA.
Spindle cell lipoma (SCL) is a benign adipocytic tumor usually found in the subcutis of the posterior neck, upper back, and shoulder, predominantly in middle-aged males. This case report describes an atypical presentation of SCL in a 26-year-old male with a history of malignant melanoma. The patient presented with an erythematous plaque with central hyperpigmentation on the right upper arm, an uncommon location and presentation for SCL.
View Article and Find Full Text PDFAnaplastic lymphoma kinase1 positive inflammatory myofibroblastic tumor of the urinary bladder: A rare mesenchymal neoplasm with diagnostic and therapeutic implications.
SAGE Open Med Case Rep
December 2024
Department of Pathology, University of California San Francisco, UCSF, San Francisco, CA, USA.
Inflammatory myofibroblastic tumors (IMTs) are rare mesenchymal neoplasms characterized by spindle-cell morphology with accompanying inflammatory infiltrates. Originally described in 1939, these tumors can arise in various anatomic locations, with the urinary bladder being a rare site of occurrence but the most common within the genitourinary tract. IMTs typically present as polypoid masses or firm submucosal nodules, often with painless hematuria in bladder cases.
View Article and Find Full Text PDFPrimitive Myxoid Mesenchymal Tumor of Infancy: A Lost Battle.
J Indian Assoc Pediatr Surg
November 2024
Department of Pediatric Surgery, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Primitive myxoid mesenchymal tumor of infancy (PMMTI) is a low to intermediate-grade, poorly differentiated myofibroblastic tumor and is characterized by its tendency to recur locally. It commonly occurs in the 1 year of life and is predominantly seen in the axial skeleton and rarely in the retroperitoneum. We report one such case of PMMTI, which is the second case reported in English literature.
View Article and Find Full Text PDFLiposarcomas 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.
View Article and Find Full Text PDFMultidisciplinary treatment of a rare rapidly progressive intracranial myxoid mesenchymal tumor of uncertain differentiation FET-CREB fusion-negative.
Neurol Sci
December 2024
Neurosurgery Unit, Department of Neuroscience "Rita Levi Montalcini", University of Turin, Turin, Italy.
Background: Non-meningothelial intracranial mesenchymal tumors are a heterogeneous group of central nervous system neoplasms endowed with great variability clinically and histologically. For this precise reason, significant difficulties exist in specifically cataloguing tumor entities with such distant characteristics and such uncertain clinical course.
Case Description: In an attempt to increase the knowledge inherent in this type of central nervous system lesions we report a case of a rare and unusual myxoid mesenchymal tumor of difficult anatomopathological classification characterized by rapid progression and optimal therapeutic response after combined surgical and radiotherapy treatment, with histo-molecular definition and DNA methylation profile.
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