Definition
Dilation of the kidney collecting system, often obstructive but not always.
Symptoms
No symptoms, flank pain, infection or reduced urine depending on cause.
How it may be discovered
Ultrasound or other imaging.
When to seek care
Fever, severe pain, a solitary kidney or absent urine needs urgent assessment.
Investigations and tests
Kidney function, urine testing and imaging to locate the cause.
Reaching a diagnosis
Assess drainage and impact; dilation size alone does not predict function.
Treatment options
Observation in selected cases or drainage and treatment of the underlying obstruction.
Explore this topic further
Continue with related explanations of how the body works and treatment options.