Histological findings showed triple cancer (magnification of background image: ×40, insert: ×400). (a) Hematoxylin-eosin (HE) staining of the small cell carcinoma of the bladder. (b) Immunohistochemical staining for CD56 demonstrated CD56-positive cells. (c) HE staining of the prostatic urethral tumor demonstrated papillary growth and malignancy. (d) HE staining of the penis showed cancer pearls and single-cell keratinocytes that are characteristic of squamous cell carcinoma.