Rare diseases · Sign or symptom
Expressive language delay
HP:0002474
What it means
A delay in the acquisition of the ability to use language to communicate needs, wishes, or thoughts.
Rare diseases that can present with this14
Very common80–99%
7Common30–79%
6- 8q24.3microdeletion syndrome
- AHDC1-related intellectual disability-obstructive sleep apnea-mild dysmorphism syndrome
- Cortical dysgenesis with pontocerebellar hypoplasia due to TUBB3 mutation
- Global developmental delay-neuro-ophthalmological abnormalities-seizures-intellectual disability syndrome
- Isolated childhood apraxia of speech
- Septopreoptic holoprosencephaly
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: Communication delay · Deficit in expressive language
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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.