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: Pathology
Origin of cancer cells in Krukenberg tumour is from:March 2013 
Select and explain. 
A. Ovarian carcinoma, B. Gastric carcinoma, C. Duodenal carcinoma, D. Pancreatic carcinoma
B: Gastric carcinoma
Answer: B: Gastric carcinoma 
Explanation: Ans. B i.e. Gastric carcinomaKrukenberg tumorIt is a malignancy in the ovary that metastasized from a primary site, classically the gastrointestinal tract, although it can arise in other tissues such as the breast.Gastric adenocarcinoma, especially at the pylorus, is the most common source.Krukenberg tumors are often (over 80%) found in both ovaries, consistent with its metastatic nature.