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
Lymphocytic infiltration is diagnostic in : 
Select and explain. 
A. Brenner's tumour, B. Dysgerminoma, C. Dermoid cyst, D. Struma ovarii
B: Dysgerminoma
Answer: B: Dysgerminoma 
Explanation: Dysgerminoma