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Patchy alopecia areata can affect only pigmented hairs, leaving gray hairs untouched.

Repigmentation in vitiligo may come from melanocyte stem cells in the skin.

Facial dark spots can be caused by the sun, genetics, makeup, or medicine, and are diagnosed by patient history and skin tests.

Postinflammatory hyperpigmentation causes dark skin patches and needs personalized treatment.

The research found that a specific skin cell type not only triggers hair growth but also controls hair color, and that aging can lead to hair loss and color changes.

The boy likely has a fungal infection causing hair loss.

Syphilitic alopecia can look like alopecia areata, so careful diagnosis is important.

Pigmentary mosaicism causes skin color changes and can affect multiple body systems, but has no cure.

A man with a type of skin lymphoma had unusual yellowish skin growths despite normal blood lipid levels, and treatment reduced some symptoms but not the growths.

Lowering homocyst(e)ine levels can reverse skin and hair lightening by restoring enzyme activity needed for pigmentation.

P-cadherin is crucial for hair follicle pigmentation but not skin pigmentation.

The woman has a type of scarring hair loss with red bumps around hair follicles.

A woman with hair loss regrew white hair after taking prednisolone.

A 20-year-old woman had stable Progressive Hemifacial Atrophy and Vitiligo after treatment, suggesting a possible link between the conditions.

A person with thyroid problems had rare, swollen, bald spots on their scalp caused by a condition usually found on the shins.

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

Lichen planus pigmentosus is hard to treat and may be more common in North Africa than previously thought.

Epithelial grafting can effectively repigment white hair in vitiligo patients.

Dermoscopy helps diagnose different hair loss conditions, and characteristics vary among ethnicities and individual cases.

Surgical repigmentation can permanently restore color to white hair in vitiligo patients.

Accurate diagnosis of pseudolymphomatous folliculitis is crucial to avoid mistaking it for more serious conditions.

Hair color is determined by melanin produced and transferred in hair follicles.

Dermoscopic features can help identify and differentiate types of pityriasis versicolor.

Treatment with vitamin A did not improve the child's skin condition.

Syphilitic alopecia is a rare hair loss condition in secondary syphilis that looks similar to another condition but can be diagnosed with specific tests and responds to antibiotics.

The document concludes that pigmentation disorders in animals involve complex interactions between melanocytes and keratinocytes.

The conclusion is that the variation in hair thinness in patients is mostly due to the amount of underdeveloped hairs, and treatments that thicken fine hairs might work for those with mild to severe conditions.

Hypothyroidism patients with hair loss typically have thinning hair, smaller hair follicles, and normal hair shedding.

A brown shadow seen in dermoscopy is a marker for lichen nitidus.