Adult granulosa cell tumor with minor foci of juvenile granulosa cell tumor in postmenopausal woman: A rare case report

INTRODUCTION: Granulosa cell tumor (GCT) is a rare neoplasm that is divided into adult GCT (AGCT) and juvenile GCT (JGCT). Generally, a patient will only have the AGCT or JGCT subtypes. Here, we presented the first case of AGTC accompanied by focal JGTC in a postmenopausal woman. PRESENTATION OF CASE: A 63-year-old postmenopausal woman came with distended abdomen accompanied by postmenopausal bleeding. CT scan shows a solid mass with cystic degeneration. Laparotomy found a solid mass from the right ovary measuring 18 × 15 × 14 cm. The pathological results showed a diffuse tumor representing AGCT, accompanied by Call-Exner bodies and nuclear groove. In addition, minor foci were also found, which consist of well-defined margins tumor and follicular-like structures that resemble JGCT. The patient underwent bilateral salpingo-oophorectomy with a total hysterectomy and no recurrence in three months follow-up. DISCUSSION: Age and clinical symptoms cannot be used as specific differentiators between AGTC and JGTC. Radiological imaging also shows a similar appearance of solid masses tumors with hemorrhagic or fibrotic changes, multilocular cystic lesions, or completely cystic tumors. The concomitant findings of JGCT and AGCT could be distinguished very carefully by anatomical pathology examination. It is crucial to differentiate AGCT from JGCT, especially to see the prognosis. CONCLUSION: The role of pathologists is needed in differentiating AGCT and JGCT, primarily when found simultaneously.