Abstract
Malignant mesenchymoma is a tumor consisting of two or more clearly identifiable and immature mesenchymal elements. In this paper a rare experience with malignant mesenchymoma presenting as a giant tumor in the thigh is described with a review of the literature. An 83-year-old woman visited the hospital because of a giant tumor on the left thigh. A giant soft tumor with a diameter of 23 cm was confirmed. Operation was carried out and well capsulated tumor was excised with the gratiris muscle. The excised tumor was 26×23×22 cm in size and 2.6 kg in weight. Two finds of histopathological findings were shown in the tumor. One was a rhabdomyosarcoma, embryonal type. The other was a well differentiated liposarcoma sclerosing type. Therefore, the patient was diagnosed as having a malignant mesenchymoma.
