Impact of p53 immunostaining in predicting advanced or recurrent placental site trophoblastic tumors: a study of 12 cases.

Objectives: To identify an indicator that can predict tumor cell spread beyond the uterine corpus.

Methods: We studied clinicopathology and immunohistochemistry of 12 cases of PSTT. Two cases of epithelioid trophoblastic tumor (ETT) were included as reference cases.