A 59-year-old female was incidentally noted to have a 1-cm sized lump in her left labium majus that subsequently increased in size to approximately 4 cm. The mass was totally excised under general anesthesia. Her postoperative follow-up was uneventful. Histologic examination of the tumor showed sheets and clusters of infiltrating tumor cells with morphologic features consistent with granular cell tumor.
Although benign and slow growing, it has a tendency for recurrence and can cause morbidity and mortality when presenting with multicentric or multiple organ involvement due to the lack of effective systemic therapy. Therefore, clinicians and pathologists should be aware of its clinical and histopathologic features.