Kidney Cyst

A kidney cyst means the scan showed a round or oval fluid-filled area in the kidney. Simple kidney cysts are common and often benign. More complex cysts may need closer review depending on how they look on imaging.

Also seen as: renal cyst, simple renal cyst.

If you are trying to place this wording inside the bigger picture of your report, start with the radiology findings hub and then compare it with the related symptom and report phrase pages below.

This term becomes more or less important depending on its size, location, severity, associated symptoms, and whether it is new compared with earlier imaging. Radiologists usually expect the finding to be read alongside the rest of the report instead of in isolation.

Simple kidney cysts are common, especially with increasing age.

• Simple benign renal cyst
• Age-related cyst formation
• Complex cyst needing characterization
• Less commonly, a cystic kidney mass

• The cyst is described as complex or enhancing
• The report recommends Bosniak characterization
• There are symptoms or kidney dysfunction

• Simple cysts often need no further action
• Complex cysts may need dedicated renal imaging
• Older scans may be reviewed for stability

A radiology finding name can sound more definite than it really is. Many findings describe an imaging pattern, not a final diagnosis, and many turn out to be less urgent once doctors match the wording with your symptoms, exam, and any earlier studies.

• Simple right renal cyst.

  See phrase explanation

• Complex cystic lesion of the left kidney, further characterization recommended.

  See phrase explanation

These pages cover the modified versions of this same finding so you can compare how wording changes when a report adds extra detail.

These educational symptom pages explain search-intent questions that often overlap with this finding.

Educational information only. Always consult your clinician for medical advice.

This page is educational only and should be used to understand report language, not to diagnose a condition or replace clinician review.