Pyelitis cystica

This code represents a rare, benign, and usually asymptomatic condition characterized by the presence of small, multiple cysts or cystic changes within the renal pelvis. These cysts are typically lined by transitional epithelium and are thought to be a reactive or inflammatory process rather than true neoplasms. It is often discovered incidentally during imaging studies or pathological examination.

Use this code when documentation explicitly states "pyelitis cystica" as a diagnosis, often found during imaging (e.g., CT scan, ultrasound) or histological examination of kidney tissue. This diagnosis typically arises in the context of investigating urinary tract symptoms or other renal conditions, but the pyelitis cystica itself may not be the primary cause of symptoms.

• Ensure documentation clearly specifies "pyelitis cystica" and not a general renal cyst or other inflammatory conditions of the renal pelvis.
• This is a morphological diagnosis; consider if an underlying cause (e.g., chronic inflammation, infection) is also documented and requires additional coding.
• Do not confuse with pyelonephritis or other acute inflammatory conditions of the kidney, as pyelitis cystica is typically a chronic, non-infectious change.