Epithelioid trophoblastic tumor: Report of two cases in postmenopausal women with literature review and emphasis on cytological findings

Saeeda Almarzooqi, Rema'A Ahmad Al-Safi, Waleed Fahad Al-Jassar, Syed M.J. Akhter, Yamina Chiab-Rassou, Alia Albawardi

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Background: Epithelioid trophoblastic tumor (ETT) is a rare gestational trophoblastic neoplasm of intermediate trophoblasts. It was first described by Shih and Kurman [Am J Surg Pathol 1998;22:1393-1403] who outlined its clinicopathologic characteristics in 14 cases, establishing it as a distinct entity of gestational trophoblastic tumors. It represents 1.39% of all gestational trophoblastic diseases. Most cases are reported in reproductive-age women following a prior gestation with a time interval between 2 weeks and 30 years. ETT is extremely rare in postmenopausal women. It is commonly misdiagnosed as a squamous cell carcinoma (SCC), poorly differentiated carcinoma or another gestational trophoblastic tumor. Limited data is available regarding its cytological features on Pap smears. Cases: We report 2 cases of uterine ETT occurring in postmenopausal women. In both cases, an initial diagnosis of an SCC and a poorly differentiated carcinoma was rendered. We highlight the features of ETT helpful in differentiating it from other mimickers with emphasis on rarely reported cytological features of this neoplasm. Conclusion: ETT is a rare tumor with characteristic cytological features, but is commonly confused with SCC. A high index of suspicion is needed to make the correct diagnosis or to raise the consideration of ETT, especially in cases with an increased β-human chorionic gonadotropin.

Original languageEnglish
Pages (from-to)198-210
Number of pages13
JournalActa Cytologica
Volume58
Issue number2
DOIs
Publication statusPublished - 2014

Keywords

  • Cytology
  • Epithelioid trophoblastic tumor
  • Squamous cell carcinoma

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology

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