Calyceal diverticulum

Synonyms and Related Keywords: Pyelocalyceal diverticulum

• Calyceal diverticulum is a relatively uncommon cyst-like lesion, often discovered incidentally during ultrasound examination of the kidneys.
• Calyceal diverticulum is a urine-containing cavity within the renal parenchyma, communicating with the collecting system through a narrow channel.
• Two types are identified:
  • One is related to a minor calyx and usually located in the upper pole
  • Other is connected with the pelvis or a major calyx in the central portion of the kidney.
• The majority of calyceal diverticulum are small and asymptomatic, and do not require any treatment.
• Calyceal diverticulua may rarely cause urinary tract infection, renal colic, pyuria, hematuria or hypertension.
• Mobile calculi and milk of calcium are characteristic findings in calyceal diverticulum.