Combined cutaneous sarcoma: pleomorphic liposarcoma and conventional osteosarcoma-the so-called malignant mesenchymoma.

[pleomorphic liposarcoma]

Malignant mesenchymoma is combined soft tissue tumors of mesenchymal origin . Cutaneous combined sarcomas are exceedingly rare . We report the case of an 81 -year -old woman who presented a left cutaneous mass . She underwent a wide local excision . Histopathological and immunohistochemical studies were consistent with the diagnosis of combined pleomorphic liposarcoma and conventional osteosarcoma (malignant mesenchymoma ). Although it is extremely rare , this case suggests that combined sarcoma should be considered in the differential diagnosis of undifferentiated pleomorphic neoplasms .