Juvenile granulosa cell tumor of the ovary: A comprehensive clinicopathologic analysis of 15 cases

Juvenile granulosa cell tumor(JGCT) is an uncommon ovarian sex-cord stromal tumor, with diverse clinical, radiological and histopathologic features. The present study describes the clinicopathological and histomorphological spectrum of JGCTs, and highlights the key differentiating features from its mimics. A retrospective analysis of all cases reported as JGCTs during 2011–19 (8 years) was performed with detailed evaluation of clinical, histopathologic data and follow-up details. Of a total 115 GCTs reported during the study period, 15(13%) were reported as JGCTs. The mean age at presentation was 17 years. Abdominal pain and distension were the most common clinical presentations. Five patients were pre-menarchal with 3 exhibiting precocious puberty. Majority of tumors were unilateral(left>right), solid-cystic, ranging in size from 4 to 20 cm. Microscopically, macrofollicular architecture was most frequent (n = 12;80%). The tumor cells depicted variable nuclear pleomorphism, small distinct nucleoli and moderate-abundant pale eosinophilic-clear/vacuolated cytoplasm. Mitotic activity ranged from 1 to 10/10HPFs. Uncommon histopathologic features included microcystic and tubulo-cystic architecture, myxoid degeneration, bizarre tumor giant cells, hob-nailing of the tumor cells, intracytoplasmic hyaline globules, multifocal calcification and thick hyalinized blood vessels. Majority(n = 12;80%) presented in stage I. Surgical treatment included unilateral salpingo-oophorectomy without any adjuvant chemotherapy, bilateral salpingo-oophorectomy (BSO) and total abdominal hysterectomy with BSO with adjuvant BEP chemotherapy (Bleomycin, etoposide, cisplatin). JGCT is a rare ovarian tumor affecting young women and children with diverse histopathologic features. Despite an aggressive histopathology, these tumors have a good outcome, when diagnosed at an early stage. •Juvenile granulosa cell tumor(JGCT) of the ovary shows diverse clinical and radiological features.•Knowledge of its characteristic histopathologic and immunohistochemical characters is important for an accurate diagnosis.•Despite an aggressive histopathology, these tumors have a good outcome, when diagnosed at an early stage.