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
Endometriosis has been identified in all organs except 
Select and explain. 
A. Pleura, B. Spleen, C. Pericardium, D. Ureter
B: Spleen
Answer: B: Spleen 
Explanation: Endometriosis is not found in spleen.