Objective To investigate the mucus fibrosarcoma (myxofibrosarcoma, MFS) clinicopathological features, immunohistochemical expression features, differential diagnosis. Methods three cases the clinical and pathological data were analyzed MFS patients, review of the literature. Results MFS occurs in older men, slow growth, more common in the limbs, rare in the trunk. Painless nodular growth, tumor composed of spindle and stel ate tumor cells, irregularly distributed in an unequal number of mucus-like material, the visible characteristic elongated curved thin-wal ed smal blood vessels, fat-like mother cells immunohistochemical vimentin, CD99 tumor cells were diffusely positive three cases, one case of SMA, one cases focal S-100 positive tumor cells. Conclusions MFS is a conclusion with myxoid variant fibroblasts malignancy, occurs in the elderly or deep subcutaneous muscular limbs, clinical manifestations of local slowly increasing painless mass. Easily misdiagnosed as benign soft tissue tumors or other malignancies.
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