Kukenberg’s tumor is ovarian metastatic tumor. Ovarian cancer is divided into several main types according to the histological type: i) epithelial ovarian cancer; ii) malignant germ cell tumors; iii) malignant supporting cell tumors; iv) metastatic tumors. Kukenberg tumor is metastatic tumor. The characteristics of ovarian metastatic tumor are bilaterality, both sides of the ovary, and solid tumor, the surface of the tumor is relatively smooth, the texture is relatively uniform, and there is no ascites, which is the characteristics of Kukenberg tumor. What is the cause of Kukenberg’s tumor? It actually does not originate from the ovary, it is a cancer originating from the digestive system, and the primary focus may be stomach cancer or intestinal cancer. When gastric cancer or intestinal cancer metastasizes, it is very easy to metastasize to both ovaries, so metastatic tumors of the ovaries appear. In fact, Kukenberg’s tumor is gastrointestinal cancer, not ovarian cancer in the true sense, and the true sense of ovarian cancer is malignant tumor originating from ovary, not secondary cancer.