Mushroom cap sign in MRI is seen in:-
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.
IIeocaecal TB
Pulmonary endometriosis
Ovarian endometriosis
Rectal endometriosis
Women Imaging