This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological oncology, Subject name: Gynaecology & Obstetrics
Most common histological subtype of cancer endometrium is : 
Select and explain. 
A. Mucinous carcinoma, B. Clear cell carcinoma, C. Squamous cell carcinoma, D. Endometrioid adenocarcinoma
D: Endometrioid adenocarcinoma
Answer: D: Endometrioid adenocarcinoma 
Explanation: Histologically most of the endometrial cancers are Adenocarcinomas Hence they are called endometriod adenocarcinoma About 10-15% are Papillary serous Clear cell Adenosquamous Pure squamous Ref : Shaw Gynecology 17e pg 434.