Extraskeletal myxoid chondrosarcoma:report of 5 cases and review of literatures / 临床与实验病理学杂志

ABSTRACT

Purpose To explore the clinicopathologic characteristics, pathologic diagnosis and differential diagnosis of extraskeletal myxiod chondrosarcoma. Methods The clinical and pathological features were studied with HE and immunohistochemical staining in 5 cases of extraskeletal myxoid chondrosarcoma, and the related literatures were also reviewed. Results Extraskeletal myxoid chondro-sarcoma was male predominance (4 males 1 female), and the age ranged from 32 to 62 years with an average of 52 years. Four tumors occurred in thigh and another in chest. Histologically, the neophlasm were composed of round and oval cells. Immunohisto-chemically, the tumor cells were positive for vimentin in five cases, synaptophysin expressed in one case, S-100 showed focal positivity in two cases, but negative for CK, p63, EMA, CD34, SMA in all cases. Molecular genetics detection shows chromosome exchange be-tween number 9 and 22. Conclusion Extraskeletal myxoid chondrosarcoma is a rare tumor which has no special characteristics in clinical and iconography, and its diagnosis mainly depends on the histopathologic features, immunohistochemistry and molecular genet-ics. Extraskeletal myxoid chondrosarcoma grows slowly, but have a high tendency for local recurrence and metastases.