Rare diseases · Sign or symptom
Abnormal lymphocyte count
Abnormal lymphocyte counts
HP:0040088
What it means
Any abnormality in the total number of lymphocytes in the blood.
Rare diseases that can present with this1
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: Abnormal number of lymphocytes · Abnormal numbers of lymphocytes · Abnormality of lymphocyte number
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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.