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Krt15+ cells in the mouse intestine resist radiation and can start tumors.

The chapter explains common scalp conditions, including infections, infestations, and tumors.

A baby had a rare case of widespread milia, which was treated and is being monitored.

Cell polarity signaling controls tissue mechanics and cell fate, with complex interactions and varying pathways across species.

Eruptive vellus hair cysts are rare, benign skin lesions that are hard to treat.

A 24-month-old Nigerian girl developed early puberty with no family history, needing treatment her family couldn't afford.

Most cases of Temporal Triangular Alopecia are found in early childhood and may be related to genetic conditions.

Two cases of a rare skin condition were successfully treated with laser therapy, offering a non-surgical treatment option.

Smaller reticle sizes are as accurate as the standard size for measuring hair density in hair restoration.

Both parties agree that cell death is important in the hair cycle, but they have different views on the role of the catagen phase and hair shedding.

The debate focuses on the role of catagen and hair shedding mechanisms in telogen effluvium.

Triangular temporal alopecia is a benign hair loss pattern best diagnosed with dermoscopy, with limited treatment options like surgery and hair transplantation.

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.

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

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

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.

Spironolactone may help enlarge a small breast linked to Becker's nevus.

Amenorrhea is relatively rare and initial testing should check FSH, TSH, and prolactin levels.

Acne is a common skin condition linked to diet, hormones, and genetics, and early treatment can prevent scarring.

Proper care and diet are crucial to prevent health issues in gerbils.

Children's hair loss has many causes and requires careful diagnosis and personalized treatment, including emotional support.

Older adults commonly experience hair loss and nail disorders due to aging and health changes, affecting their quality of life.

Nevus comedonicus is a rare skin condition with grouped open pores, sometimes linked to other body issues.

Hair loss in Cronkhite-Canada syndrome may be due to an autoimmune response.

Face-lifts can lead to complications like bleeding, nerve injury, skin death, hair loss, and rare infections, with careful surgery reducing risks.

The document concludes that individuals with a rare genetic disorder linked to the AEBP1 gene may experience a unique type of hair loss and should be monitored for heart issues.

Scalp expansion is an effective way to reconstruct the scalp with good cosmetic outcomes.

A patient with Cronkhite-Canada syndrome improved with nutritional support and steroids, but early diagnosis is key due to high mortality.

Cooling the scalp may prevent hair loss from chemotherapy, hair often grows back after treatment, and nail issues usually improve after stopping the drug.

PHAT may improve hair growth better than PRP alone.