HighlightsKrukenberg tumour (KT) is defined as a metastatic ovary carcinoma.KT is usually of gastric origin, but can be applied to metastatic tumors originating from carcinomas of other sites, such as the colon.Ovarian metastasis of the colorectal carcinoma is uncommon and, when it does occur, it tends to be synchronous, rather than metachronous.The immunohistochemical evaluation helps to distinguish primary ovarian carcinoma from metastatic carcinomas.