Urinary bladder metastasis

Urinary bladder metastasis, also metastasis to the bladder, is cancer that has spread to the urinary bladder from another primary site and is discontinuous with the primary tumour.

General

• Rare - mostly case reports.
  • Renal cell carcinoma ~ series of 11 cases.

A 2007 review of the literature found:

• 264 reported cases from 1953 to June 2005 - most from GU tract and the colorectum.
  • Distant site includes breast, stomach and melanoma.

Microscopic

Features:

• Dependent on the primary site.

DDx:

• Urothelial carcinoma with unusual features.
• Primary adenocarcinoma of the urinary bladder.
• Urachal carcinoma.
• Direct extension of primary tumour from other primary site, e.g. prostate, rectum.

Images

• 

  CCRCC in bladder - very low mag. (WC)

• 

  CCRCC in bladder - low mag. (WC)

• 

  CCRCC in bladder - intermed. mag. (WC)

• 

  CCRCC in bladder - high mag. (WC)

See also

• Metastasis.