This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Female Genital Tract, Subject name: Pathology
BA lady with abdominal mass was investigated. On surgery, she was found to have b/1 ovarian masses with smooth surface. On microscopy they revealed mucin secreting cells with signet ring shapes. What is your diagnosis? 
Select and explain. 
A. Dysgerminoma, B. Krukenberg tumour, C. Primary Adenocarcinoma of the ovaries, D. Dermoid cyst
B: Krukenberg tumour
Answer: B: Krukenberg tumour 
Explanation: Ans. (b) Krukenberg tumour(Ref: Robbin's Pathology 9th Ed/Pg 1032; Robbin's Pathology 8th ED/PG 1050; Shaw's Textbook of Gynaecology 15/e pg 425)Krukenberg Tumor*Refers to a metastatic bilateral ovarian malignancy whose primary site is GIT or breast. Q*Composed of cellular or myxomatous stroma with scattered mucin-producing, signet-ring cancer cells, most often of gastric origin (70%) Q*Ca colon, appendix, breast (sp invasive lobular carcinoma), pancreas and gall bladder are other primary sites.