Rare diseases · Sign or symptom
Right atrial enlargement
HP:0030718
What it means
Increase in size of the right atrium.
This feature can be appreciated on chext radiography, MRI, or CT.
Rare diseases that can present with this10
Common30–79%
4Sometimes5–29%
4The 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: Dilated right atrium · Enlarged heart right atrium · Right atrial dilatation
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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.