Rare diseases · Sign or symptom

Cerebriform connective tissue nevus

HP:6000009

What it means

The cerebriform connective tissue nevus (CCTN) is one of the most characteristic skin findings. It commonly occurs on the soles of the feet, and frequently causes problems because of pain, pruritus, infection, bleeding,exudation, odor, and walking impairment.

The cerebriform connective tissue nevus is frequently observed in patients with Proteus syndrome and it is an important specific criterion for diagnosis.

Rare diseases that can present with this1

Common30–79%

1

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

Cerebriform connective tissue nevus

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This 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.