Megapolycalycosis is a rare congenital anomaly of the kidney which is characterised by dilatation and increase in number of the renal calyces without any distal obstruction.

Symptoms related to calculus or urinary tract infection such as such as pain, haematuria, fever and dysuria are seen. Renal function is generally normal.

It is thought to develop due to an abnormal development of the renal medulla. 

Due to the calyceal dilatation there is stagnation of urine leading to urinary tract infection and formation of calculi.

Classically, enlarged kidneys with uniform calyceal dilatation. The rest of the excretory system is generally normal.

  • dilatation of calyces without dilatation of pelvis and ureter
  • best functional and structural analysis

Same as IVP findings though ultrasound gives only morphological assessment.

Megapolycalycosis usually does not require any treatment unless complicated by calculi or infection which then may require specific management. 

Regular follow-up should occur due to the high risk of infection and calculus formation.

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Article information

rID: 25370
Tag: cases, refs
Synonyms or Alternate Spellings:
  • Megapolycalicosis

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