Heterologous sarcomas of the uterus.

Three cases of heterologous sarcomas of the uterus are presented. Two were mixed tumors; one was a lipoleiomyosarcoma; and one was an osteogenic sarcoma with leiomyosarcoma. The third was a rhabdomyosarcoma. These tumors are believed to behave more aggressively than mixed mesodermal tumors. Six months after initial diagnosis, the lipolieomyosarcoma had metastasized to a vertebra. Following radiation therapy, the metastases recurred at the same site. The rhabdomyosarcoma of the uterus produced lung metastases 4 months following surgery, and the patient died 14 months after initial diagnosis despite extensive chemotherapy. The patient with osteogenic sarcoma of the uterus with leiomyosarcoma had been treated with Adriamycin and is alive and well 1 year following initial diagnosis. The histogenesis of these tumors is reviewed.