Importance of peritoneal cytologic washings in endometrial cancer is newly recognized. In a series of 60 patients. 16 ( 27 % ) had malignant cells in the oeritoneum. Grade of tumor, depth of myometrial invasion, and stage of disease correlated with presence of cancer cells in the pelvis (p < 0.001, p < 0.01. p < 0.05 respectively). Lymph node involvement versus cytology did not correlate however (p > 0.10). One year survival of patients with positive cytology was significantly lower (p— 0.016).All patients with endometrial cancer, especially in Stage I. should have cytologic evaluation of peritoneal washings during TAH BSO. P32 instillation and/ or progestational agents can be used as adjunctive therapy in these cases.