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A sarcoma composed of spindle cells that produce collagenous fibrils.



an immature malignant tumor of connective tissue; a malignant variant of fibroma, fibromyoma (leiomyoma), or fibroadenoma that can occur in any part of the body. It is characterized by invasive and destructive growth but sometimes has distinct contours. In cross section it looks like fish flesh. A fibrosarcoma has a marked capacity to metastasize, chiefly through blood vessels. It can often be distinguished from a fibroma only by histological examination and is treated surgically.

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Experiments were performed on the murine fibrosarcoma model.
Inflammatory myofibroblastic tumor, inflammatory fibrosarcoma, and related lesions: an historical review with differential diagnostic considerations.
21) No staining was observed in nodular fasciitis, desmoids, infantile myofibromatosis, infantile fibrosarcoma, synovial sarcoma, leiomyoma, or myofibrosarcoma.
The S-100 stain is also useful in excluding diagnoses of fibrosarcoma and fibrous histiocytoma, which are uniformly S-100--negative.
The PAs production by metastatic breast cancer cells and HT1080 fibrosarcoma cells can be modulated through interactions with basement membrane components.
7] The second most common malignant tumor was fibrosarcoma which was in contrast to the studies of Fang and Tsujimoto where liposarcoma was found to be the second commonest malignant tumor.
The morphological picture of a cellular and atypical spindle cell tumor raised the differentials of GIST, smooth muscle tumor, desmoid tumor, fibrosarcoma, and inflammatory fibroid polyp.
Ameloblastic fibrosarcoma of the jaws: a clinicopathologic and DNA analysis of five cases and review of the literature with discussion of its relationship to ameloblastic fibroma.
Additional reports of radiation therapy in psittacine birds include 2 cases of fibrosarcoma in blue and gold macaws.
The diferencial diagnostic include: dermoid cysts [8], papillomatosis [7], SCC [3], condrosarcoma [5], cutaneous melanocytoma [9], basal cell carcinoma in a dromedary camel [2], cutaneous plexiform neurilemmoma (Schwannoma) [6], and fibrosarcoma and osteosarcoma.