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Of particular importance, the presence of pseudo-lipoblasts in a myxoid sarcoma-like background is an extremely strong indicator that the tumor is a MFS. [ 6 ] and tumors with a myxofibrosarcoma-like histopathology that initiate in the retroperitoneum, abdominal cavity, or pelvis are nearly always dedifferentiated liposarcomas .
The epithelioid inflammatory myofibroblastic sarcoma subtype of IMT shows sheets of epithelioid to round cells within a myxoid (i.e. appears blue or purple compared to the normal red appearance of connective tissue when appropriately H&E stained and examined under the microscope), collagenous, or mixed myxoid-collagenous matrix, <5% spindle ...
EMC was firstly described in 1953 by Stout et al. when they discussed the different species of extraskeletal chondrosarcoma, [2] but EMC concept was firstly proposed in 1972 by Enzinger et al. [3] Brody thought that this was a unique low-grade malignancy with a low growth rate and both clinically and histopathologically distinct anamnesis beside the typical chondrosarcomas. [4]
A myxoid liposarcoma is a malignant adipose tissue neoplasm [1] of myxoid appearance histologically.. Myxoid liposarcomas are the second-most common type of liposarcoma, representing 30–40% of all liposarcomas in the limbs, occurring most commonly in the legs, particularly the thigh, followed by the buttocks, retroperitoneum, trunk, ankle, proximal limb girdle, head and neck, and wrist.
The round cell form of myxoid liposarcomas also appears to have a relatively poor prognosis: in various retrospective reviews, myxoid liposarcoma was usually found to be low-grade and therefore relatively responsive to chemotherapy whereas high grade (i.e. round cell) myxoid lipsarcoma had higher rates of metastasis, behaved more aggressively ...
The World Health Organization in 2020 classified the fibro sarcomatous DFSP (DFSP-FS) variant (also termed dermatofibrosarcoma protuberans, fibro sarcomatous) of the dermatofibrosarcoma protuberans as a specific form of the intermediate (rarely metastasizing) fibroblastic and myofibroblastic tumors and other variants of this disorder as a specific form of the intermediate (locally aggressive ...
Undifferentiated pleomorphic sarcoma (UPS), also termed pleomorphic myofibrosarcoma, [1] high-grade myofibroblastic sarcoma, and high-grade myofibrosarcoma, [2] is characterized by the World Health Organization (WHO) as a rare, poorly differentiated neoplasm (i.e., an abnormal growth of cells that have an unclear identity and/or cell of origin). [3]
A myxoid tumor is a connective tissue tumor with a "myxoid" background, composed of clear, mucoid substance. [1] Atrial myxoma. This tumoral phenotype is shared by many tumoral entities: Myxomas. Atrial myxoma; Odontogenic myxoma; Cutaneous myxoma; Intramuscular myxoma; Myxoid hamartoma; Aggressive angiomyxoma; Myxoid leiomyoma; Chondromyxoid ...