Atypical granular cell tumour of the sural nerve mimicking a Schwannoma.

The article focuses on atypical granular cell tumour of the sural nerve mimicking. Granular cell tumours are usually found in the skin of head, neck, and tongue and may be multiple. Other less common sites are breast, gastrointestinal tract, vulva, peripheral and central nervous system, spermatic cord, and upper respiratory tract. Granular cell tumours in the upper and lower extremities are mostly located in the skin and subcutaneous tissue. Reports of granular cell tumours of peripheral nerves are extremely rare, and there are only few cases involving the median, radial, ulnar, digital, sciatic, trigeminal, and recurrent laryngeal nerves.