Spindle cell epitheliomas of the vagina are rare benign tumors of uncertain histogenesis. It has been hypothesized that they originate from a pluripotent cell population. Here, we report 2 cases of spindle cell epitheliomas of the vagina. Both patients presented with a painless vaginal nodule. The resected lesions were solid, well circumscribed, and composed of a proliferation of epithelioid or epithelial cells admixed with spindle cells without atypia. The 2 cellular populations expressed epithelial and mesenchymal markers. Based on these morphologic and immunohistochemical findings, a diagnosis of spindle cell epithelioma was rendered in both cases. Furthermore, we describe for the first time the expression of WT-1 (Wilms' tumor protein 1) and calretinin in addition to the previously defined immunohistochemical profile.
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http://dx.doi.org/10.1177/1066896915587920 | DOI Listing |
Microtubule-severing enzymes play essential roles in regulating diverse cellular processes, including mitosis and cytokinesis, by modulating microtubule dynamics. In the early branching protozoan parasite , microtubule-severing enzymes are involved in cytokinesis and flagellum length control during different life cycle stages, but none of them have been found to regulate mitosis in any life cycle form. Here, we report the biochemical and functional characterization of the microtubule-severing enzyme spastin in the procyclic form of .
View Article and Find Full Text PDFSSNA-1 is a fibrillar protein localized at the area where dynamic microtubule remodeling occurs including centrosomes. Despite the important activities of SSNA1 to microtubules such as nucleation, co-polymerization, and lattice sharing microtubule branching, the underlying molecular mechanism have remained unclear due to a lack of structural information. Here, we determined the cryo-EM structure of SSNA-1 at 4.
View Article and Find Full Text PDFCureus
December 2024
Pathology, Avalon University School of Medicine, Willemstad, CUW.
Dermatofibrosarcoma protuberans (DFSP) is a rare, locally invasive cutaneous sarcoma with a high propensity for recurrence, even following complete surgical excision. DFSP exhibits a low metastatic potential and is characterized by a distinctive honeycomb-like architecture composed of uniformly arranged spindle cells that frequently show CD34 immunostaining. Common surgical approaches include wide local excision (WLE), Mohs micrographic surgery (MMS), and, in severe cases, amputation.
View Article and Find Full Text PDFJ Orthop Case Rep
January 2025
Department of Orthopaedics, Mahatma Gandhi Medical College and Hospital, Jaipur, Rajasthan, India.
Introduction: Low-grade myofibroblastic sarcoma (LGMS) is an atypical and extremely infrequent type of tumor, primary mass being usually present in subcutaneous and soft tissue. Bony involvement is very rare. It has a very high chance of recurrence locally due to its aggressive biological behavior, metastasis in other parts of body is rarely seen.
View Article and Find Full Text PDFOrthop Res Rev
January 2025
Department of Oncology, Xiangyang No. 1 People's Hospital, Hubei University of Medicine, Xiangyang, 441000, People's Republic of China.
Background: Granular cell tumor (GCT) is a rare soft tissue tumor characterized by Schwann cell differentiation. While GCT can occur in any part of the body, it is less common in the lower limbs. We report a case of a giant atypical GCT located in the left thigh, the tumor was initially small and painless at the time of discovery but gradually grew to 17 cm over a two-year period.
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