Rare diseases · Sign or symptom

Camptodactyly of finger

Permanent flexion of the finger

HP:0100490

What it means

The distal interphalangeal joint and/or the proximal interphalangeal joint of the fingers cannot be extended to 180 degrees by either active or passive extension.

Note that some restrict the use of the term to inability to extend the proximal interphalangeal joint of the fifth finger. We do not restrict the term in this way. This term should not be used if the patient has Clenched hand. A similar effect can be created by radial angulation within the distal phalanx with thickening of the epiphysis, which is called Kirner deformity or dystelephalangy. The affected digits should be specified.

Rare diseases that can present with this153

Very common80–99%

46

Common30–79%

34

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: Camptodactyly of hands · Camptodactyly of proximal interphalangeal joint · Contractures of the proximal interphalangeal joints of the fingers · Flexion contractures of proximal interphalangeal joints · Proximal interphalangeal finger joint contractures

Camptodactyly of finger

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This 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.