STUDY OF TWELVE CASES ON MALIGNANT MYOGENIC TUMORS OF THE STOMACH

During 26 years and 6 months (from January 1965 to June 1991), eleven patients with malignant myogenic of stomach origin were experienced. Malignant myogenic tumors represented 0.93 per cent of 1297 malignant primary tumors of the stomach in the same period, and 50 per cent of 24 myogenic tumor of the stomach. Five-year survival rate was 75 per cent. These findings were almost comparable to those reported in many other papers. Six out of 11 cases presented with an abnormal tumor, so this would be a distinctive complaint in malignant myogenic tumor of stomach origin. In this study, the convalescence was parallel to the histological malignancy (mitosis rate). Postoperative deaths due to early recurrence commonly occurred in cases with a tumor diameter of 10 cm or more. A great contribution of tumor diameter to the prognosis was considered. Regardless of tumor size and invasion depth, lymph node metastasis rarely developed. Many of the lymph node metastases were in the first field, and each one in the second and third field was noted.