Rare diseases · Sign or symptom
Borderline intellectual disability
Intellectual disability, borderline
HP:0006889
What it means
Borderline intellectual disability is defined as an intelligence quotient (IQ) in the range of 70-85.
We choose to define the concept of borderline intellectual disability onthe basis of the commonly used range of 70-85 (IQ), but note that in DSM-5, IQ boundaries are no longer part of the classification.
Rare diseases that can present with this23
Common30–79%
6Sometimes5–29%
15- Blepharophimosis-ptosis-esotropia-syndactyly-short stature syndrome
- Citrullinemia type I
- Colobomatous microphthalmia-obesity-hypogenitalism-intellectual disability syndrome
- Corpus callosum agenesis-macrocephaly-hypertelorism syndrome
- Generalized epilepsy-paroxysmal dyskinesia syndrome
- Hyperlysinemia
- Micrognathia-recurrent infections-behavioral abnormalities-mild intellectual disability syndrome
- Prader-Willi syndrome due to paternal 15q11q13 deletion
and 7 more in this range
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: Mental retardation, borderline
Tracking symptoms like this for someone? Eleplan keeps symptoms, diagnoses, medications and every specialist in one plan.
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.