<prompt> All are true about Krukenbergs tumor except:It is always secondaryMost common primary is stomachUsually bilateralitySignet ring cells are seen  <response>: Ans. A. It is always secondaryKrukenberg tumor is generally a metastatic tumor to the ovary. But Krukenberg tumor may be a primary tumorThe most common primary sites from where metastases to the ovaries occur are gastrointestinal tract pylorus, colon and rarely small intestine, gallbladder, pancreas, breast and endometrial carcinoma. These are usually bilateral tumors which maintain shape of the ovary. Histologically signet ring looking cells are characteristic of Krukenberg tumor. 