[A case of localized amyloidosis of the urethra].

A case of localized amyloidosis of the urethra is reported. A 42-year-old man visited with the complaint of urethral discharge and urethral tumor on May 24, 1985. A small fingertip sized, elastic hard mass was present on the left side of the external urethral meatus. Cold cup biopsy of the urethral tumor was done. Histological examination of the tumor showed amorphous eosinophilic tissue staining. Green birefringence indicating amyloidosis by Congo red staining was observed under polarized light microscope. Since the patient's symptoms were minimal, no specific therapy was instituted.