Stage IV micropapillary serous ovarian carcinoma: a report of three cases.

Micropapillary serous carcinomas (MPSCs) have been distinguished from typical ovarian serous borderline tumors. Although the clinical features of MPSCs have been described in several studies, there is almost no clinicopathologic information regarding stage IV MPSC patients. We describe three cases of stage IV invasive MPSC with clinical and pathologic findings. One case had an umbilical metastasis (Sister Mary Joseph's nodule), and the other two cases had cytologically positive pleural effusions. These cases demonstrate the potential of MPSCs for aggressive clinical behavior and distant metastases.