K66.2: Retroperitoneal fibrosis

Retroperitoneal fibrosis is a rare disorder characterized by the growth of fibrous tissue in the area behind your stomach and intestines, known as the retroperitoneal area. This fibrous tissue can bind your organs and vessels together, leading to issues like swelling in your legs or problems with kidney function. While the exact root cause is unknown, it may occur as a reaction to certain medications, infections, or due to autoimmune conditions. Symptoms often begin subtly, with vague pain in the lower back or sides, and may include kidney-related problems, such as decreased urine output. This condition typically progresses slowly and can lead to serious complications if left untreated, notably affecting your urinary system, which includes the kidneys, bladder, and connecting tubes.

Patient Disclaimer

The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.

If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.

For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.