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Hormones and genetics affect hair growth and patterns, with some changes reversible and others not.

Androgens can both promote and prevent hair growth due to differences in gene expression in hair follicles.

Scalp cooling can reduce chemotherapy-induced hair loss and should be available in all hospitals.

Children's hair grows in different types from before birth through puberty, with growth rates and characteristics varying by age, sex, and race.

Dihydrotestosterone increases the activity of an enzyme in pubic skin cells that converts testosterone to dihydrotestosterone.

Hair loss in women may have causes other than hormones.

Cancer treatments often cause hair disorders, significantly affecting patients' quality of life, and better management methods are needed.

Testosterone and dihydrotestosterone affect hair growth, and new techniques like the folliculogram help study it, but fully understanding hair growth is still complex.

Hair problems can be caused by genetics or the environment, and treatment should focus on the cause and reducing hair damage.

Genetic mutations can cause hair growth disorders by affecting key genes and signaling pathways.

Hormones, nutrition, and seasonal changes regulate hair growth cycles, with androgens extending growth phases and factors like aging and malnutrition affecting hair loss and thinning.

Trichoscopy is a useful tool for diagnosing hair disorders without pulling out hair.

The document explains how to identify different hair problems using a microscope.

Scalp hair grows at 0.37 mm/day, forearm hair at 0.18 mm/day, and thigh hair at 0.30 mm/day, with no significant differences found in people with certain hair conditions.

Cronkhite-Canada Syndrome often leads to death within 6-18 months.

Light microscopy is useful for diagnosing different hair disorders.

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

The document concludes that unruly hair can be congenital or acquired, often lacks specific treatments, and can be managed with oils and short hairstyles.

Higher androgen levels do not cause baldness in men.

Hair loss in systemic lupus erythematosus patients is unique and improves with treatment.

The document concludes that hair loss is common and can be treated with medications like minoxidil or surgical options, and it significantly affects people's psychological well-being.

The document explains different hair loss types and treatments, emphasizing diagnosis through examination and tests, and specific treatments for each condition.

Androgens can both increase body hair and cause scalp hair loss.

Beard hair extraction improves scalp hair restoration results in East Asian men with severe hair loss.

Some psychiatric drugs can cause severe hair loss, especially valproic acid, and it's more likely in women or those with thyroid issues or past hair loss.

The girl with autoimmune hair loss might regrow hair within a year, and treatments can help but not prevent recurrence; dermatologist referral and corticosteroids are recommended.

Up to 50% of scalp hair can be lost before it appears thin, and treatment is only needed for hair loss caused by diseases or deficiencies.

Naproxen is not the cause of hair loss in a child; it's due to a toxic event with expected hair regrowth.

Testosterone can both promote hair growth and cause baldness by affecting hair growth signals.

Hair transplantation has evolved to refined techniques like FUE and FUT, with Finasteride and Minoxidil as the only other proven treatments for hair loss.