title: Flow cytometric DNA analysis of placental-site trophoblastic tumors.
abstract: The placental-site trophoblastic tumor is a rare form of gestational trophoblastic neoplasia. Although originally considered benign, it is now apparent that this lesion can be associated with aggressive clinical behavior. Our study examined the DNA ploidy status and clinicopathologic features of four new cases of placental-site trophoblastic tumor. Three cases demonstrated diploid DNA stemlines with S-phase fractions ranging from 6% to 16%. These patients were alive and well at follow-up and had low-serum human chorionic gonadotrophin (hCG) levels. A fourth patient, who had a large tumor, demonstrated a tetraploid DNA peak with a prominent S-phase fraction. This patient exhibited an elevated serum hCG at limited follow-up. Flow cytometric DNA analysis may be a useful adjunct for the identification of placental-site trophoblastic tumors with malignant potential.
authors.affiliation: Department of Surgical Pathology, Indiana University School of Medicine, Indianapolis 46202.
authors.forename: P K
authors.initials: PK
authors.lastname: Kotylo
authors.forename: H
authors.initials: H
authors.lastname: Michael
authors.forename: T E
authors.initials: TE
authors.lastname: Davis
authors.forename: G P
authors.initials: GP
authors.lastname: Sutton
authors.forename: P R
authors.initials: PR
authors.lastname: Mark
authors.forename: L M
authors.initials: LM
authors.lastname: Roth
mesh_terms: D000328:Adult; D004273:DNA, Neoplasm / Q000032:analysis*; D004171:Diploidy; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D011247:Pregnancy; D014328:Trophoblastic Neoplasms / Q000235:genetics / Q000473:pathology*; D014594:Uterine Neoplasms / Q000235:genetics / Q000473:pathology*
chemical_list: D004273:DNA, Neoplasm