Fig. 1.

Histopathological findings in the tumors of the uterus and kidney. (A) Epithelial tumor cells exhibit a tubular growth pattern in the endometrium. Mitotic figures are often observed in the tumor cells (arrow). (B) Solitary syncytiotrophoblast-like cells with prominent cellular atypia proliferated in the desmoplastic interstitium of the mesometrium. Mononuclear cell infiltration was observed in the interstitium. (C) A cluster of infiltrated tumor cells includes cytotrophoblast-like cells and syncytiotrophoblast-like cells (arrows) with an ill-defined tubular growth pattern in the mesometrium. (D) Metastatic epithelial tumor cells in the kidney are arranged in a tubular or cribriform growth pattern similar to the growth pattern of tumor cells in the uterus. Desquamative epithelial cells were observed in the luminal cavity (A, D). Scale bar=50 µm (All images have the same magnification).