[Four case reports of sarcoma combined with carcinoma].

We report 4 cases of double cancer, combined sarcoma and carcinoma. Case 1 was a 50-year-old woman, had a malignant fibrous histiocytoma in the leg and an advanced gastric carcinoma. The soft tissue sarcoma was resected and the gastric carcinoma was treated with chemotherapy. She died from pulmonary metastasis from the sarcoma. Case 2 was a 72-year-old woman with a liposarcoma in the leg and a thyroid carcinoma. Both tumors were resected, however, she died from pulmonary metastasis from the carcinoma. Case 3 was a 65-year-old man with a liposarcoma in the buttock and lung carcinoma. Both tumors were resected and he is alive and disease-free. Case 4 was a 47-year-old man with spindle cell sarcoma of the tibia and a rectal carcinoma. Both tumors were treated surgically, but he died from pulmonary metastasis from the sarcoma. We suggest that the combination of sarcoma and carcinoma is very rare and that the prognosis in these cases is very poor.