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The document concludes that permanent hair loss conditions are complex, require early specific treatments, and "secondary permanent alopecias" might be a more accurate term than "secondary cicatricial alopecia."

Different types of stem cells in hair follicles play unique roles in wound healing and hair growth, with some stem cells not originating from existing hair follicles but from non-hair follicle cells. WNT signaling and the Lhx2 factor are key in creating new hair follicles.

A genetic change in the EDAR gene causes the unique hair traits found in East Asians.

BMP2 and BMP7 have opposite roles in feather formation.

Trichoscopy is a useful non-invasive method for diagnosing different hair loss conditions.

Follistatin helps hair growth and cycling, while activin prevents it.

Mice lacking a key DNA methylation enzyme in skin cells have a lower chance of activating stem cells necessary for hair growth, leading to progressive hair loss.

Wnt, Eda, and Shh pathways are crucial for different stages of sweat gland development in mice.

Some children are born with unusually short, fine hair because their hair growth phase is short, but this often gets better by itself during puberty.

Androgens may block hair growth signals, targeting this could treat hair loss.

The study concludes that the EDA2R gene is activated by p53 during chemotherapy but is not necessary for chemotherapy-induced hair loss.

Mice without the Sp6 gene have problems developing several body parts, including hair, teeth, limbs, and lungs.

Some families have a genetic condition where they are born with irregular scalp defects.

Blocking the FGF5 gene in sheep leads to more fine wool and active hair follicles due to changes in certain cell signaling pathways.

The document says that treating the root cause of hair follicle damage is crucial to prevent permanent hair loss, and treatment options vary.

A rare ITGB6 gene variant causes intellectual disability, hair loss, and dental issues.

Hair shaft dysplasias are abnormal hair conditions that can be inherited or acquired and may signal other health issues, with limited treatment options available.

Leg hair can be used for eyelash transplants, resulting in fuller lashes with less maintenance.

Four children had unmanageable pale blond hair due to uncombable-hair syndrome.

SGK3 is essential for proper hair growth and health.

Hair loss has many causes and treatments, and losing some hair daily is normal; proper diagnosis is key, and minoxidil can help treat it.

An 80-year-old patient grew new hair on a wound, showing that elderly people can still regenerate hair.

New and known mutations in the hairless gene cause a hair loss condition called Atrichia with papular lesions.

Finasteride use during early pregnancy may cause limb deformities in babies.

Researchers found stem cells in dog hair follicles using specific markers.

Most dogs have hair whorls on their chest and limbs, with shelter dogs and short-haired dogs having more chest whorls.

A newborn girl had a rare case of salivary gland tissue on her chest, which was safely removed.

Teratoma hair is similar to scalp hair but has a rougher surface and lower adhesive force.

The girl's condition improved with treatment, showing no new autoimmune diseases and hair regrowth.

Removing p16INK4a from skin cells can lead to faster and more clumped growth, which might help with hair growth.