Kidney CT Appearances

Calyceal Diverticulum CT Findings

• Pelvicalyceal system diverticula communicates with the central collection system
• Well defined
• Thin wall
• Low density
• Can be empty or filled with urine
• May have stones and/or calcifications
• Typically up to 7.5cm but can be larger
• Type 1:
  • Most commonly in upper pole
  • Diverticula communicates with a renal calyx
• Type II:
  • Located in the interpolar region
  • Diverticula communicates with the renal pelvis
  • Typically larger than Type I

Other Information About Calyceal Diverticulum

Etiology:

• Unknown

Epidemiology:

• Rare
• Can present at any age

Presentation:

• Asymptomatic

Prognosis:

• Calyceal diverticulum is benign

Related Lectures:
CT of Calyceal Abnormalities in the Kidney: Pearls and Pitfalls - Part 2