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
The risk of endometrial cancer is highest with the following histological pattern of endometrial hyperplasia : 
Select and explain. 
A. Simple hyperplasia without atypia, B. Simple hyperplasia with atypia, C. Complex hyperplasia without atypia, D. Complex hyperplasia with atypia
D: Complex hyperplasia with atypia
Answer: D: Complex hyperplasia with atypia 
Explanation: Risk of endometrial cancer Simple hyperplasia without atypia: 1% Complex hyperplasia without atypia: 3% Simple hyperplasia with atypia: 8% Complex hyperplasia with atypia: 29%