[Granular cell tumor of the rectum: description of a case with unusual histological features].

The localization of granular cell tumor to the rectum is rare. We describe a case characterized by areas with spindle cell pattern, pleomorphic cells with acidophilic granular cytoplasm, nuclear variations and absence of mitoses. Diagnosis has been confirmed by immunohistochemical study. After 22-month follow-up the patient does not show evidence of recurrence or metastases.