<prompt> Bilateral metastatic ovarian tumor from gastrointestinal malignancies is known as:Theca cell tumourFibromasGranulosa cell tumourKrukenberg tumor  <response>: Malignant tumors that metastasize to the ovary are almost invariably bilateral. The term Krukenberg tumor refers to a metastatic mucinoussignet ring cell adenocarcinoma of the ovaries that typically originates from primary tumors of the intestinal tract, characteristically the stomach. Ovarian metastases often represent a late disseminated stage of the disease in which other hematogenous metastases are also found Ref: Hoffman B.L., Schorge J.O., Schaffer J.I., Halvorson L.M., Bradshaw K.D., Cunningham F.G., Calver L.E. 2012. Chapter 35. Epithelial Ovarian Cancer. In B.L. Hoffman, J.O. Schorge, J.I. Schaffer, L.M. Halvorson, K.D. Bradshaw, F.G. Cunningham, L.E. Calver Eds, Williams Gynecology, 2e. 