title: Placental site trophoblastic tumor: Immunohistochemistry algorithm key to diagnosis and review of literature.
abstract: •Histologic morphology is frequently equivocal for PSTTs.•Histology combined with immunohistochemical staining was necessary to make the diagnosis.•PSTT confined to the uterus was successfully treated with surgery alone.
authors.affiliation: University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA.
authors.forename: John W
authors.initials: JW
authors.lastname: Luiza
authors.affiliation: Department of Obstetrics and Gynecology, Magee-Womens Hospital, University of Pittsburgh Medical Center, 300 Halket Street, Pittsburgh, PA 15213, USA.
authors.forename: Sarah E
authors.initials: SE
authors.lastname: Taylor
authors.affiliation: Department of Pathology, Breast, and Gynecologic Pathology, Magee-Womens Hospital, University of Pittsburgh Medical Center, 300 Halket Street, Pittsburgh, PA 15213, USA.
authors.forename: Faye F
authors.initials: FF
authors.lastname: Gao
authors.affiliation: Department of Obstetrics and Gynecology, Magee-Womens Hospital, University of Pittsburgh Medical Center, 300 Halket Street, Pittsburgh, PA 15213, USA.
authors.forename: Robert P
authors.initials: RP
authors.lastname: Edwards
keywords: Chemoresistant; Gestational trophoblastic neoplasm; Placental site trophoblastic tumor; hPL