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A 5-year-old girl has sparse, dry, and brittle hair but is otherwise healthy.

The document concludes that diagnosing hair loss requires evaluating multiple histological features, as no single feature is definitive on its own.

Temporal triangular alopecia is a lifelong condition with hairless patches on the side of the head that may be present from birth.

Women with severe acne, hirsutism, and androgenic alopecia often have higher levels of certain androgens, but the specific pattern can't be predicted just by looking at symptoms.

The report concludes that PCOS is mainly a condition of excess male hormones and its definition may change as new information is discovered.

Mice without the vitamin D receptor have bone issues and other health problems, suggesting vitamin D is important for preventing various diseases in humans.

The guideline suggests using specific criteria to diagnose PCOS, recommends various treatments for its symptoms, and advises screening for related health issues.

Hair follicle biology advancements may lead to better hair growth disorder treatments.

Dermatoscopy and videodermatoscopy are useful for diagnosing and monitoring various skin, hair, and nail conditions.

Women with PCOS have heart-related issues not because of obesity, but due to insulin resistance and low adiponectin levels.

The conclusion is that PCOS is caused by ovarian sensitivity to hormones and disrupted hormone control, possibly due to ovarian factors, and more research is needed.

Children with loose anagen hair have easily pluckable hair due to root sheath problems, and it might improve without treatment.

Women with PCOS have different levels of certain fats and proteins in their blood, which could help diagnose the condition.

Certain groups may need vitamin supplements to improve hair health and prevent other health problems.

PCOS affects women's health by increasing the risk of diabetes, heart disease, and reproductive issues.

Prolactin affects the production of different keratins in human hair, which could lead to new treatments for skin and hair disorders.

PCOS symptoms change with age; younger women have higher androgen levels and less metabolic issues, while older women face more metabolic challenges despite milder PCOS symptoms.

Vitamin D receptor is crucial for starting hair growth after birth.

Loose Anagen Hair Syndrome is a hereditary condition causing hair loss in children due to abnormal hair follicles.

Mice lacking Insig proteins had hair growth problems due to cholesterol buildup, but this was fixed by the drug simvastatin.

Hair loss in secondary syphilis is more common than thought and can be reversed with antibiotics.

α3β1-integrin is crucial for maintaining normal hair follicle shape and function but not needed for the development of the surrounding skin.

Women with PCOS have lower ghrelin levels and a weaker response to sugar, which might affect their feeling of fullness and lead to overeating.

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.

Men with Frontal fibrosing alopecia typically lose hair on the front scalp and sometimes on sideburns and upper lip, with treatments showing varied success.

The French Endocrine Society suggests diagnosing PCOS with two of three signs, recommends lifestyle changes and clomiphene for treatment, and calls for more research on certain treatments and tests.

Accurate clinical, histological, and genetic methods are key for understanding and treating hair disorders.

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

Most dogs with alopecia had higher than normal levels of certain hormones, but hair loss might not always be linked to these hormone changes.

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