Rare diseases · Sign or symptom

Abnormal calvaria morphology

Abnormality of the skull cap

HP:0002683

What it means

Abnormality of the morphology (structure) of the calvaria (skullcap), that is, of that part of the skull that is made up of the superior portions of the frontal bone, occipital bone, and parietal bones and covers the cranial cavity that contains the brain.

The calvaria, or skull cap, is the upper part of the skull (cranium) and comprises the frontal, occipital and right and left parietal bones. Occasionally, calvaria is misspelled as 'calvarium' in the medical literature.

Rare diseases that can present with this12

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: Abnormality of calvarium · Abnormality of cranial vault · Abnormality of cranium · Abnormality of the calvaria · Abnormality of the shape of calvarium · Abnormality of the skullcap

Abnormal calvaria morphology

Tracking symptoms like this for someone? Eleplan keeps symptoms, diagnoses, medications and every specialist in one plan.

Start free with Eleplan

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.