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FB51.40 Primary retroperitoneal fibrosis

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

This is the commonest form of retroperitoneal fibrosis. By definition, no associated trigger (e.g. drugs or malignancy) can be determined, although atherosclerosis of the abdominal aorta is often associated. It has been postulated that such atherosclerosis may be of aetiological significance in some cases.

synonyms

• Primary retroperitoneal fibrosis
• idiopathic retroperitoneal fibrosis
• Chronic periaortitis

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