<prompt> The following statements are related to Krukenberg tumor except:It is always secondaryThe most common primary site is pylorus of the stomachThe tumor is bilateralSignet ring looking cells are characteristic  <response>: Ans. is a, i.e. It is always secondaryRef: Dutta Gynae 6thed, p387 Krukenberg tumor is generally a metastatic tumor to the ovary. But Krukenberg tumor may be a primary tumor - Ref: Dutta Gynae 6thed, p387 The 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. In most patients with Krukenbergs tumors, the prognosis is poor. Median survival being less than a year. Rarely, no primary site can be identified and the Krukenbergs tumor may be a primary tumor.Also know: Metastatic tumors from the GI tract can be associated with sex hormone estrogen and androgen production.Patient may present with postmenopausal bleeding. 