Rare diseases · Sign or symptom
Telangiectasia
HP:0001009
What it means
Telangiectasias refer to small dilated blood vessels located near the surface of the skin or mucous membranes, measuring between 0.5 and 1 millimeter in diameter. Telangiectasia are located especially on the tongue, lips, palate, fingers, face, conjunctiva, trunk, nail beds, and fingertips.
Rare diseases that can present with this22
Very common80–99%
4Common30–79%
7Sometimes5–29%
10- 1p36deletion syndrome
- 9q33.3q34.11microdeletion syndrome
- Bannayan-Riley-Ruvalcaba syndrome
- Bloom syndrome
- Capillary malformation-arteriovenous malformation
- Congenital sialidosis type 2
- Hyperphosphatasia-intellectual disability syndrome
- Mixed connective tissue disease
and 2 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, and Orphanet separately records 1 disease where this sign is specifically absent. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: Spider veins · Telangiectases
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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.