Rare diseases · Sign or symptom
Fasting hypoglycemia
Low blood sugar when fasting
HP:0003162
Rare diseases that can present with this18
Very common80–99%
7- Autosomal dominant hyperinsulinism due to Kir6.2 deficiency
- Autosomal dominant hyperinsulinism due to SUR1 deficiency
- Carnitine-acylcarnitine translocase deficiency
- Cataract-growth hormone deficiency-sensory neuropathy-sensorineural hearing loss-skeletal dysplasia syndrome
- Congenital hyperinsulinism due to HNF4A deficiency
- Donohue syndrome
- Non-insulinoma pancreatogenous hypoglycemia syndrome
Common30–79%
8- Fanconi-Bickel syndrome
- Fructose-1,6-bisphosphatase deficiency
- Glycogen storage disease due to liver and muscle phosphorylase kinase deficiency
- Glycogen storage disease due to liver phosphorylase kinase deficiency
- Hyperinsulinism due to HNF1A deficiency
- Insulin autoimmune syndrome
- Rabson-Mendenhall syndrome
- Silver-Russell syndrome due to maternal uniparental disomy of chromosome 7
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
Fasting hypoglycemia
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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.