This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'Most common cause of postmenopausal vaginal bleeding is? \nSelect and explain. \nA. Endometrial carcinoma, B. Carcinoma cervix, C. Carcinoma vulva, D. Ovarian tumor', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Endometrial carcinoma REF: Berek and Novak\'s gynecology by Jonathan S. Berek, Emil Novak page 1349, Blueprints Obstetrics and Gynecology by Tamara L. Callahan, Aaron B. Caughey page 238 "The most common cause of post-menopausal bleeding is endometrial and/or vaginal atrophy (not in options), not cancer. Endometrial cancer accounts for only 10-15% of cases" "However since endometrial malignancy can coexist with atrophic changes and with H, endometrial carcinoma must be ruled out in any case of post-menopausal bleeding" The most common malignancy to present with postmenopausal bleeding is Endometrial carcinoma The most common cause of post coital vaginal bleeding is cervical cancer. Causes of post-menopausal bleeding: Cause Percentage Endometrial atrophy 60-80 Exogenous estrogen 15-25 Endometrial cancer 10 Endometrial polyps 2-12 Endometrial hyperplasia 5-10', 'role': 'assistant'}]