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
A lady with abdominal mass was investigated. On surgery, she was found to have bilateral ovarian masses with smooth surface. On microscopy they revealed mucin-secreting cells with signet ring shapes. Most probable diagnosis is: 
Select and explain. 
A. Krukenberg tumor, B. Dysgerminoma, C. Mucinous adenocarcinoma of the ovaries, D. Dermoid cyst
A: Krukenberg tumor
Answer: A: Krukenberg tumor 
Explanation: Ans: A. Krukenberg tumor(Ref Robbins 9/e p1034: 8/e p1050)Krukenberg tumor:Classic metastatic gastrointestinal carcinoma involving ovaries.Features:Characterized by bilateral metastases composed of mucin-producing, signet-ring cancer cells, most often of gastric origin.