A case of granular cell tumor of the urinary bladder is reported. A 48-year
-old Japanese man with a bladder tumor underwent transurethral resection of
the tumor and microscopic examination showed a granular cell tumor. Immuno
histochemical staining for neuron specific enolase and S100 protein was pos
itive, and it was suggested that the granular cell tumor was derived from S
chwann cells.