Gynaecology & Obstetrics Endometrial cancer involving 50% of endometrium, extending to vagina, lymph nodes negative with positive peritoneal cytology is staged as A 3a B 3b C 3c1 D 3c2 💡 Explanation Endometrial cancer involving 50% of endometrium, extending to vagina, lymph nodes negative with positive peritoneal cytology is staged as ✓ Correct Answer: B. 3b