Rare diseases · Sign or symptom
Hypoplastic fifth fingernail
Underdeveloped fifth fingernail
HP:0008398
What it means
A nail of the fifth finger that is diminished in length and width, i.e., underdeveloped nail of little finger.
Rare diseases that can present with this2
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: Underdeveloped fingernail of little finger · Underdeveloped fingernail of pinkie finger · Underdeveloped fingernail of pinky finger
Tracking symptoms like this for someone? Eleplan keeps symptoms, diagnoses, medications and every specialist in one plan.
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.