Rare diseases · Sign or symptom
Abnormal sputum
HP:0032016
What it means
Abnormal appearance of material expectorated (coughed up) from the respiratory system and that is composed of mucus but may contain other substances such as pus, blood, microorganisms, and fibrin.
Rare diseases that can present with this10
Common30–79%
4Sometimes5–29%
5The 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 sputum morphology
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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.