Granular cell tumors are an uncommon soft tissue neoplasm of neurogenic origin. Although they originate from a Schwann cell, the neurogenic origin is rarely confirmed during the surgery. We report herein on the case of a 43-year-old woman with a granular cell tumor originating from the ansa cervicalis. The mass was located in the right neck. The tumor was firm, oval in shape, and about 3 cm in diameter. Ultrasonography showed a 30 mm oval formation localized in the right neck, anterior to the sternocleidomastoid muscle. On computed tomography (CT) scan, the lesion showed up as non-enhanced on contrast medium injection, and magnetic resonance imaging (MRI) showed a hyperintense mass on T1 and T2-weighted sequences, enhancement by contrast medium injection. There was no invasion of the surrounding tissues. Based on the results of fine-needle aspiration cytology, there was no malignancy. The tumor was surgically removed, and the histopathological diagnosis was a granular cell tumor. The patient has had an uneventful course after hospital discharge without recurrence for more than 6 months. There are few reports on granular cell tumors associated with the nerves in the head and neck region. This is the first report of granular cell tumor originating from the ansa cervicalis.
