Rare diseases · Sign or symptom
Short middle phalanx of the 2nd finger
Short middle bone of index finger
HP:0009577
What it means
Hypoplasia (congenital reduction in size) of the middle phalanx of the second finger, also known as the index finger.
Rare diseases that can present with this3
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: Brachymesophalangy II (finger) · Hypoplastic middle index finger phalanx · Hypoplastic/small middle phalanx of the 2nd finger
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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.