Rare diseases · Sign or symptom
Osteoma cutis
HP:0025027
What it means
The term osteoma refers to the anomalous presence of ossification (bone formation) in the interior of the dermis or epidermis. The dermal or subcutaneous bone formation presents as stony hard nodules. The osteomata appear as irregular, hardened small nodules that are well circumscribed and generally of the same color as the skin.
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: Cutaneous osteosis · Miliary osteoma · Osteomatosis
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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.