Non-gestational ovarian Choriocarcinoma: a comprehensive review of current knowledge

Abstract

non-gestational ovarian choriocarcinoma is an extremely rare and highly aggressive germ cell tumor, accounting for less than 0.6% of all ovarian cancers. Unlike its gestational counterpart, non-gestational choriocarcinoma arises independently of pregnancy and lacks paternal genetic material, defining it as a distinct clinicopathological entity. Although most cases occur in women of reproductive age, instances in postmenopausal patients have also been reported. Its rarity, rapid progression, and early hematogenous dissemination pose considerable diagnostic challenges. Because clinical and laboratory findings often overlap with more common gynecologic conditions, accurate diagnosis requires a comprehensive multidisciplinary approach. Imaging modalities such as ultrasonography, computed tomography, and magnetic resonance imaging are essential for detecting pelvic masses and assessing metastatic spread, but histological, immunohistochemical, and genetic examinations remain the cornerstone of definitive diagnosis. Microscopically, non-gestational choriocarcinoma is characterized by biphasic proliferation of cytotrophoblasts and syncytiotrophoblasts, typically accompanied by extensive hemorrhage and necrosis. Diagnostic markers, including elevated serum β‑human chorionic gonadotropin and expression of placental proteins such as placental alkaline phosphatase and human placental lactogen, provide critical diagnostic support. These findings confirm trophoblastic differentiation and assist in distinguishing of non-gestational choriocarcinoma from other ovarian germ cell tumors with overlapping features. Despite advances in diagnostic techniques, prognosis remains poor due to the aggressive course and early metastasis, most frequently to the lungs, liver, and brain. The limited number of published cases impedes the development of standardized diagnostic and therapeutic protocols, contributing to variability in clinical outcomes and underscoring the importance of each documented case. This review consolidates current knowledge on ovarian non-gestational ovarian choriocarcinoma, emphasizing its clinical presentation, morphopathological characteristics, and diagnostic complexities. By highlighting the absence of unified recommendations and the risk of misdiagnosis—particularly in women of reproductive age—this work aims to serve as a valuable resource for oncologists, pathologists, gynecologists, medical educators, and researchers engaged in the study of germ cell neoplasms and trophoblastic tumors.