Rare diseases · Sign or symptom
Microcytic anemia
HP:0001935
What it means
A kind of anemia in which the volume of the red blood cells is reduced.
In normocytic anemia, the mean corpuscular volume (MCV) is below normal limits (>80 fl in adults).
Rare diseases that can present with this20
Very common80–99%
8- Alpha-thalassemia
- Alpha-thalassemia-intellectual disability syndrome linked to chromosome 16
- Alpha-thalassemia-myelodysplastic syndrome
- Beta-thalassemia
- Delta-beta-thalassemia
- Dermatitis herpetiformis
- Hemoglobin C-beta-thalassemia syndrome
- Hypogonadotropic hypogonadism-severe microcephaly-sensorineural hearing loss-dysmorphism syndrome
Common30–79%
4Sometimes5–29%
7The 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: Microcytic anaemia
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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.