Caring for someone with this diagnosis? Eleplan keeps diagnoses, medications, documents and every specialist in one plan.
Start free with EleplanBloom syndrome
ORPHA:125Disease
Also called BSyn
What it is
Bloom syndrome is a rare disorder associated with pre- and postnatal growth deficiency, a telangiectatic erythematous rash of the face and other sun-exposed areas, insulin resistance and predisposition to early onset and recurrent cancer of multiple organ systems.
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Antenatal, Neonatal
- Inheritance
- Autosomal recessive
- Classified as
- Disease
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
Signs and symptoms
Very common80–99%
7Common30–79%
22- Abnormal proportion of CD8 T cells
- Cafe-au-lait spot
- Cutaneous photosensitivity
- Decreased circulating IgA level
- Decreased circulating IgG level
- Decreased circulating total IgM
- Decreased head circumference
- Decreased proportion of CD4-positive T cells
- Gastroesophageal reflux
- Hypopigmentation of the skin
- Insulin resistance
- Malar flattening
- Male infertility
- Micrognathia
- Narrow face
- Neoplasm
- Otitis media
- Poor appetite
- Premature ovarian insufficiency
- Recurrent infections
- Retrognathia
- Skin rash
Sometimes5–29%
33- Abdominal obesity
- Abnormal blistering of the skin
- Abscess
- Acute lymphoblastic leukemia
- Acute myeloid leukemia
- Azoospermia
- Bronchitis
- Cheilitis
and 25 more in this range
These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
Gene
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
Powered by Eleplan
A rare diagnosis is just the start. Eleplan keeps the whole care plan in one place.
Diagnoses, medications, documents, appointments, and the whole care team — organized and always in sync, so you are not retelling the same story to every new specialist. With Ellie, your AI care assistant, on top of it. Free to start.