A case report of atypical granular cell tumor of bladder.

INTRODUCTION AND IMPORTANCE: The development of granular cell tumor (GCT) in urinary bladder is a very rare disorder. CASE PRESENTATION: We reported a 50-year-old male, who was referred with vague pelvic pain. There was a hypoechoic mass with diameters of 30*25 mm in frontal wall of bladder in the sonogram. CLINICAL DISCUSSION: The patient underwent transurethral resection of the bladder tumor. Subsequent pathology and immunohistochemistry findings supported the diagnosis of atypical GCT. CONCLUSION: The patient was tumor-free at the follow up. It seems that GCT is usually benign in nature and can be treated by excisional surgery.