This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Women Imaging, Subject name: Radiology
Mushroom cap sign in MRI is seen in:- 
Select and explain. 
A. IIeocaecal TB, B. Pulmonary endometriosis, C. Ovarian endometriosis, D. Rectal endometriosis
D: Rectal endometriosis
Answer: D: Rectal endometriosis 
Explanation: Rectosigmoid endometriosis: - The endometrial deposit on rectum causes proliferation of muscularis propria and the surrounding tissues which is seen as "mushroom cap sign" in T2 weighted MRI.