Serpentine fibula–polycystic kidney syndrome
medical condition

Exner syndrome, also known as serpentine fibula polycystic kidney syndrome, is a rare disorder, typified by the afflicted person having oddly formed, s-shaped fibulas as well as the development of numerous cysts in the kidneys.
Symptoms and signs
All of the following are usual elements of the syndrome:
Short stature
Abnormal calf bone shape (fibula)
Unusual facial appearance
Polycystic kidneys
Abnormally long fibula
Mild sunken chest
Large corneas
Inguinal hernia
Umbilical hernia
Diagnosis
Exner syndrome is sometimes misdiagnosed as interstitial cystitis in its very early stages, but once the fibula begins to malform, Exner is the only real diagnosis.
History
The syndrome was discovered in June, 1988 by Dr. G. Exner, a researcher at Orthopädische Universitätsklinik Balgrist in Zurich, Switzerland. Exner officially named the disorder serpentine fibula polycystic kidney syndrome, but the term "Exner syndrome" became more prevalent. While some research links it to other, related disorders, most research suggests that Exner syndrome is very distinct.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Nov 18, 2025. The linked authority identifier is Q7455128. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1988.
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This entry incorporates text from “Serpentine fibula–polycystic kidney syndrome” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.