Occipital neonatal alopecia - Hair and Scalp
Transient neonatal hair loss typically occurs 8-12 weeks after birth. However, neonates can be born with this localized alopecia. Darkly pigmented neonates are born with more hairs in anagen, and the conversion to telogen is delayed compared to lighter-skinned neonates. Consequently, transient neonatal hair loss occurs later in more darkly pigmented neonates.
The hair loss typically presents as a well-demarcated patch of non-scarring alopecia, most commonly in the occipital area, although parietal involvement is occasionally seen.
L65.8 – Other specified nonscarring hair loss
238469005 – Friction alopecia
Differential Diagnosis & Pitfalls
- Alopecia areata – rare in neonates
- Aplasia cutis – scarring alopecia present at birth, resulting from incomplete skin coverage of the scalp
- Halo scalp ring – a ring of alopecia seen in neonates, thought to result from caput succedaneum
- Pressure alopecia – not exclusive to neonates; often seen in ill patients who are immobilized for long periods of time
- Plagiocephaly – flattening of the head; positioning contributes to the development of this condition
- Tinea capitis – acquired hair loss with associated scale, erythema, and occasionally pustules and papules; occipital lymph nodes may be palpable
- Triangular alopecia – congenital non-scarring alopecia of the temporal scalp, unilateral or bilateral; vellus hairs may be present in the affected areas