Apr 11, 2022 · Dermatofibromas (also known as fibrous histiocystomas) are a spectrum of benign dermal-based lesions with fibroblastic and histiocytic differentiation

Dec 23, 2025 · AFH is a rare mesenchymal tumor characterized by solid nodules of epithelioid to spindled cells, blood filled pseudoangiomatous spaces, a fibrous pseudocapsule and …

Nov 11, 2024 · Fibrous histiocytoma is a benign fibrohistocytic tumor that arises within the subcutaneous or deep soft tissues and rarely metastasizes

Oct 7, 2025 · Angiomatoid fibrous histiocytoma is an uncommon tumor of uncertain cell lineage that presents as a subcutaneous or deep nodule.

Feb 29, 2024 · Undifferentiated pleomorphic sarcoma (UPS) is a pleomorphic malignant neoplasm of bone lacking a distinct line of differentiation

Feb 29, 2024 · Nonossifying fibroma is a benign fibrohistiocytic tumor arising in the metaphysis of long bones of skeletally immature individuals, composed of bland fibroblastic proliferation admixed with …

Aug 8, 2022 · Controversial relationship to myxoid angiomatoid fibrous histiocytoma with similar EWSR1 fusion genes (Histopathology 2014;65:144) Primary pulmonary myxoid sarcoma (PPMS) and myxoid …

Uses by pathologists Marker of fibrohistiocytic proliferations Marker of dermal dendrocytes Differentiates dermatofibrosarcoma protuberans (CD34+, factor XIIIa-) from dermatofibroma or benign fibrous …

Soft tissue - Solitary fibrous tumor (extrapleural); fibroblastic tumor characterized by haphazardly arranged spindled to ovoid cells, prominent staghorn vasculature and NAB2-STAT6 gene …

Oct 10, 2025 · Multicentric reticulohistiocytosis is a rare form of non-Langerhans cell histiocytosis (proliferation of histiocytic cells) characterized clinically by cutaneous papules and nodules with …