Rare diseases · Sign or symptom
Low posterior hairline
Low hairline at back of neck
HP:0002162
What it means
Hair on the neck extends more inferiorly than usual.
This feature is often seen in later childhood, as the neck lengthens, in an individual who was born with redundant nuchal skin, which should be assessed and coded separately.
Rare diseases that can present with this68
Very common80–99%
23- Camptodactyly-joint contractures-facial skeletal defects syndrome
- Cantú syndrome
- Cataract-hypertrichosis-intellectual disability syndrome
- Cataract-intellectual disability-hypogonadism syndrome
- Cornelia de Lange syndrome
- Difference of sex development-intellectual disability syndrome
- Hypogonadism-mitral valve prolapse-intellectual disability syndrome
- Intellectual disability, Wolff type
- Isolated Klippel-Feil syndrome
- Jung syndrome
- Maternal uniparental disomy of chromosome X syndrome
- Mayer-Rokitansky-Küster-Hauser syndrome type 2
- Microcephalic primordial dwarfism, Montreal type
- Monosomy 9p syndrome
- Noonan syndrome-like disorder with loose anagen hair
- Paternal uniparental disomy of chromosome X syndrome
- Progeria-short stature-pigmented nevi syndrome
- Recombinant 8 syndrome
- Ring chromosome 6 syndrome
- Ring chromosome 8 syndrome
- Thoracomelic dysplasia
- Wolf-Hirschhorn syndrome
- X small rings syndrome
Common30–79%
27- Baraitser-Winter cerebrofrontofacial syndrome
- Cardiofaciocutaneous syndrome
- Cerebrofaciothoracic dysplasia
- Combined immunodeficiency with facio-oculo-skeletal anomalies
- Craniofrontonasal dysplasia
- Craniofrontonasal dysplasia-Poland anomaly syndrome
- Distal duplication 17q syndrome
- Duane retraction syndrome
- Edinburgh malformation syndrome
- Emery-Nelson syndrome
- Facial dysmorphism-shawl scrotum-joint laxity syndrome
- Fetal hydantoin syndrome
- Lateral meningocele syndrome
- Malan overgrowth syndrome
- Monosomy 18p syndrome
- Monosomy X syndrome
- Mosaic monosomy X syndrome
- Noonan syndrome
- Pelviscapular dysplasia
- Postaxial polydactyly-dental and vertebral anomalies syndrome
- SCARF syndrome
- Spondyloepiphyseal dysplasia-brachydactyly-speech disorder syndrome
- Trisomy 20p syndrome
- Trisomy 8p syndrome
- Turner syndrome
- Turner syndrome due to structural X chromosome anomalies
- X-linked intellectual disability, Nascimento type
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
Also called: Low posterior hair line
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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.