Rare diseases · Sign or symptom
Abnormal cartilage collagen
HP:0008271
What it means
Abnormal morphology of collagen fibers in cartilage. In cartilage, collagen II, actually a collagen II:IX:XI heterofibril, is by far the most important type of collagen. A number of abnormalities may be appreciated by electron micrography or biochemical investigations, including sparse collagen fibers in the cartilage matrix.
Rare diseases that can present with this1
The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: Abnormal hyaline collagen · Abnormal type II collagen
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Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.