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Barn owls with smaller black spots have higher testosterone levels, which might be due to genetic effects on hormone regulation rather than hormone effects on coloration.

Angiotensin II is found at higher levels in black sheep skin and may influence coat color.

Complete removal of large scalp nevi is recommended to prevent complications.

Vitiligo causes white skin patches, often starts before age 20, and is linked to other health issues.

Old C57BL/6 mice with unsynchronized hair cycles show less melanin in their spleens.

Congenital atrichia with papular lesions is often misdiagnosed, and new diagnostic criteria can improve accuracy.

Foxn1 is essential for hair pigmentation by directing pigment transfer to hair cells.

Injecting α-MSH made mice's hair turn black.

Transplanting small skin grafts can successfully repigment leukoderma.

The man has a disease causing skin patches, thickened nerves, and mild muscle weakness.

Valproic acid can rarely cause reversible nail discoloration.

Vitamin B12 deficiency can cause skin and hair color changes, which can be reversed with treatment.

Hair color is not a risk factor for developing alopecia areata.

White hair from alopecia areata can turn pigmented after treatment.

UV light makes skin signs of lack of carotene and vitamin A more visible.

Laser treatments are the most effective for porokeratotic adnexal ostial nevus.

The boy likely has a fungal infection causing hair loss.

Transplanted skin on hooded rats often grows white hair instead of black.

Mutations in the hairless gene cause hair loss and skin cysts in rhesus macaques.

Dopamine affects coat color changes in agouti mice.

A unique hair tumor with a rippled pattern was identified, showing incomplete differentiation and unusual cell arrangements.

We need more research on human hair follicle pigmentation, not just mouse models.

Two red-haired men with alopecia areata regrew black hair instead of red.

Skin pigmentation increases in CRPS-affected areas and improves with symptom relief.

PAON shows skin patterns due to genetic mosaicism.

The treatment didn't work for the woman's hair loss and skin darkening.