A malignant (cancerous) tumor made up of fibrous tissue, which is a type of soft tissue cancer.
From fibro- + sarcoma (Greek sarx, flesh + -oma, tumor). This medical term emerged in the late 1800s to classify a specific category of mesenchymal cancers.
Fibrosarcomas are sneaky because they grow in the soft tissues that connect and support your muscles and organs—places where doctors might not expect trouble—and they can grow quite large before being noticed.
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