Monarch Disease Ontology entry MONDO_0019202 (myxofibrosarcoma) is a malignant fibroblastic neoplasm arising from the soft tissue. It is characterized by the presence of spindle-shaped cells, cellular pleomorphism, thin-walled blood vessels, fibrous septa, and myxoid stroma. Also known as: fibromyxosarcoma, myxoid MFH, myxoid fibrous histiocytoma, myxoid malignant fibrous histiocytoma.