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Hedgehog signaling can create new hair follicles but may also cause tumors.

African Americans have less hair density than whites.

Laser hair removal works well for people with dark hair and light skin, but it's less effective for light hair or dark skin; improvements are expected.

Some men lost hair after deoxycholic acid treatment for neck fat, but most saw improvement or resolution.

The outer root sheath in hair follicles changes during growth, with different keratinization processes in its layers.

Understanding hair follicle structure is key for treating hair disorders and could help develop new treatments.

Ketoconazole shampoo improves hair growth and reduces oil similarly to minoxidil in male pattern hair loss.

HIV-1 may cause increased stem cell death in hair follicles, leading to hair loss.

Hair loss in autoimmune blistering skin diseases varies and may regrow with disease control.

Some people with primary cicatricial alopecia also have inflammatory bowel disease, suggesting a possible connection.

Hair transplantation is a treatment for hair loss mainly caused by genetics, with various techniques and potential complications, and results visible after 8-12 months.

Alexander the Great's engineers built a causeway using a natural sand bridge, some tiger moths avoid bats by mimicking toxic relatives' sounds, early metabolism and RNA enzymes support the ancient RNA world theory, and vitamin D is crucial for hair growth and its absence can cause baldness.

Older hair follicle stem cells have a reduced ability to renew themselves, leading to more hair loss.

The document concludes that an experimental drug may help wound healing in Epidermolysis Bullosa, links Hydroa vacciniforme to EBV, discusses diagnosing hair loss disorders, finds many children with eczema have allergies, reviews the safety of a skin medication in children, notes side effects of a Duchenne's treatment, and identifies a marker for pediatric mastocytosis.

Horizontally sectioned scalp biopsies are more reliable for diagnosing hair loss in women when three samples are taken instead of one.

The conclusion is that FFA and LPP have similar scalp biopsy features, making them hard to distinguish histologically, and FFA may be a specific kind of scarring hair loss.

AGA patients have fewer hairs and smaller follicles; T:V ratio above 4:1 may indicate AGA.

Lichen planopilaris mostly affects women with fair skin and can look different on each person, needing early treatment to prevent hair loss.

Aging alone barely affects the number of hair follicles, meaning hair loss is minimal without other conditions like androgenetic alopecia.

The arrector pili muscle might play a role in hair loss and needs more research to understand its impact.

Horizontal sections of scalp biopsies are good for diagnosing Central Centrifugal Cicatricial Alopecia and help customize treatment.

Vemurafenib therapy can cause hair loss, but clobetasol propionate foam can help regrow hair.

A new method using visual aids to diagnose hair diseases was effective after brief training.

Polarized microscopy is a quick and free method to correctly identify types of hair loss.

Researchers found a new early sign of Frontal Fibrosing Alopecia that could help avoid misdiagnosis.

Ex vivo dermatoscopy may lower lab costs and improve diagnosis speed for hair loss biopsies.

Hair transplants for male baldness can show inflammation and fibrosis, but more research is needed to confirm LPP presence.

Localized dystrophic epidermolysis bullosa (DEB) can lead to scarring alopecia, highlighting the need to recognize and address this complication.

Some people may temporarily lose more hair in certain areas after a hair transplant.

Mycophenolate mofetil may improve symptoms and stop hair loss in Lichen planopilaris, but more research is needed.