A Case of Solitary Cutaneous Myxoma

Cho, Young Eun; Kim, Seong Hyun; Choi, Ha Young; Myung, Ki Bum

Abstract

Solitary cutaneous myxoma(SCM), sometimes referred to as superficial angiomyxomas, are relatively uncommon benign myxoid soft tissue tumors. Clinically the lesions present as slowly growing asymptomatic nodules on the head, neck, and trunk of adults. They are located in the dermis or subcutis and show sharp circumscription without encapsulation when seen in the dermis. We describe a case of a large solitary firm, pedunculated mass on the lower back of a 30-year-old woman without any other features. Histologically, the tumor was composed of widely scattered spindle- or stellate-shaped cells with ill-defined cytoplasm and variable sized vessels within basophilic myxoid stroma. There was no nuclear atypia and mitotic figures. The mucoid matrix was strongly positive for alcian blue staining, and on immunohistochemistry the stromal cells were positive for vimentin. The tumor was surgically resected with no evidence of recurrence after 5 months.