loin mass

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Loin masses are usually the result of some enlargement of the kidneys or their collecting systems, unilaterally or bilaterally. Unusually, massive enlargement of the adrenals can cause a loin mass.

Causes of loins masses include:

  • renal tumours
  • hydronephrosis
  • adult polycystic disease
  • adrenal tumours
  • renal vein thrombosis
  • acute tubular necrosis

Note that a massively enlarged liver or spleen, or a mass arising from the gastrointestinal system may cause an apparent mass in the loin.

Last reviewed 01/2018