Simple Renal Cyst

Overview
  • Simple Renal Cysts can be solitary or multiple nephronic dilations found in the renal parenchyma that are normally asymptomatic but must be distinguished from renal tumors.
Morphology
  • Simple renal cysts range in size from 1 to 8 cm and are normally filled with a clear fluid.
Clinical Consequences
  • Typically, simple renal cysts are completely asymptomatic although sudden hemorrhage into them can cause acute flank pain. In general, they are detected incidentally on radiography after which they must be distinguished from renal tumors.