hair collar sign


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Related to hair collar sign: Hair Color

hair collar sign

a tuft of hypertrophic hair in the midline scalp of a baby; may be a cutaneous marker for neural tube dysraphism.

hair collar sign

In the newborn, a ring of long, dark, coarse hair surrounding a midline nodule on the scalp. This may indicate neural tube closure defect.
See also: sign
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In a 2005 study of 12 heterotopic neural nodules of the scalp, 10 had a hair collar sign, 9 had capillary stain overlying the nodule, and 5 had calvarial defects in the bone that were identified with preoperative imaging.
Congenital dermoid cysts need imaging, except on eyebrow
Some cases of aplasia cutis congenita will have a so-called hair collar sign, which is a ring of dark hair that often surrounds a scalp lesion.
Incontinentia pigmenti lesions evolve

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