Placental Site Trophoblastic Tumor

Section Editor: Dharam M. Ramnani, MD

Virginia Urology, Richmond, VA, USA

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Placental site trophoblastic tumor (PSTT) consists of intermediate trophoblastic cells. The tumor cells have large, irregular hyperchromatic nuclei and abundant eosinophilic cytoplasm. Multinucleated forms are quite common.
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