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Black dots under trichoscopy can appear in different hair and scalp conditions, not just in alopecia areata.

Etretinate has only moderate effects on localized scleroderma and lichen sclerosus.

No consistent link between genotype and phenotype in 5-α-Reductase type 2 deficiency.

The document concludes that identifying the cause of amenorrhea is crucial for proper treatment.

Skin and hair can help us understand organ regeneration, especially how certain stem cells might be used to form new organs.

The exact cause of increased 5α-reductase activity leading to hirsutism in women is still unknown.

Puerariae Flos extract may help treat hair loss by blocking a hair loss-related enzyme and promoting hair growth.

Women with polycystic ovary syndrome tend to have a longer anogenital distance.

High androgen levels and genetic factors likely cause Becker's nevus and related symptoms.

People who carry the 21-Hydroxylase Deficiency gene are not more likely to have excessive male hormone levels.

Taking 5-α reductase inhibitors for prostate enlargement or hair loss does not significantly raise the risk of erectile dysfunction.

Amenorrhea is when a woman doesn't have periods, with primary amenorrhea starting by age 15 or within five years of breast development, and secondary amenorrhea when periods stop for three months. It affects 3-4% of women not pregnant, breastfeeding, or in menopause, mainly due to polycystic ovary syndrome, hypothalamic amenorrhea, hyperprolactinemia, and ovarian failure.

The document concludes that early diagnosis and treatment are crucial for children with hair loss to prevent permanent damage, although not all conditions can be effectively treated.

Use "female pattern hair loss" term, finasteride may help, more research needed.

Finasteride doesn't affect hormone levels in normal men.

Finasteride and dutasteride effectively treat hair loss in men and women, but may cause side effects like low libido and depression.

Lash ptosis is more common and severe in people with congenital eyelid droop than in those with acquired eyelid droop or without eyelid droop.

Suppressing certain hormones might help prevent prostate cancer.

People with Down's syndrome often have more skin problems due to a weak immune system.

Patients with GATA2 deficiency show early skin symptoms that help diagnose the condition.

Tofacitinib helped a young woman's severe hair loss and arthritis but not her plaque psoriasis.

Light microscopy is useful for diagnosing different hair disorders.

Rice bran extract might help prevent hair loss.

Testicular microlithiasis may increase the risk of testicular cancer and patients with it should be closely monitored.

The review highlights the need for more research on transgender dermatology, the role of dermatologists in gender affirmation, and the effects of hormone therapy on skin and hair.

Amenorrhea, or the absence of periods, should be evaluated by age 15 or within five years of early breast development, and is most commonly caused by conditions like polycystic ovary syndrome and hypothalamic amenorrhea.

New research is needed to create better drugs that block the enzyme responsible for conditions like male baldness and prostate enlargement.

Genetic factors alone might not cause pemphigus vulgaris; other factors like birth complications and puberty may trigger it.

The perception of excessive hair growth in women as abnormal is more influenced by cultural norms than by medical reasons.

Post-finasteride patients show changes in gut bacteria, possibly causing various symptoms.