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Stem cell self-renewal is complex and needs more research for full understanding.

Fat-derived stem cells show promise for skin repair and reducing aging signs but need more research for consistent results.

Different types of stem cells exist within individual skin layers, and they can adapt to damage, transplantation, or tumor growth. These cells are regulated by their environment and genetic factors. Tumor growth is driven by expanding, genetically altered cells, not long-lived mutant stem cells. There's evidence of cancer stem cells in skin tumors. Other cells, bacteria, and genetic factors help maintain balance and contribute to disease progression. A method for growing mini organs from single cells has been developed.

Fat cells in the skin help start healing and form important repair cells after injury.

Understanding the mouse hair cycle is crucial for cancer research.

Hormonal treatments can help with acne but are not the first choice due to side effects and the need for careful patient selection.

Some women with common hair loss may develop permanent hair loss.

The document explains how the male reproductive system works, its role in making testosterone, and how conditions like obesity can disrupt it, leading to low testosterone and fertility issues.

Nuclear hormone receptors play a significant role in skin wound healing and could lead to better treatment methods.

The guide explains how to study human and mouse sebaceous glands using various staining and imaging techniques, and emphasizes the need for standardized assessment methods.

Scarring alopecia affects different hair follicle stem cells than nonscarring alopecia, and the infundibular region could be a new treatment target.

New understanding of the causes of primary cicatricial alopecia has led to better diagnosis and potential new treatments.

Trichoscopy is good for diagnosing and monitoring hair and scalp problems in children but needs more research for certain conditions.

Prolactin may be important for skin growth and immune function.

Testosterone replacement therapy can prevent men from fathering children and should not be used by those wanting to stay fertile.

Adrenal disorders can cause lasting brain and behavior issues in children.

Different drugs for prostate-related urinary symptoms work but have various side effects, and treatment should be tailored to the individual.

DHT's role in hair loss is important, but measuring its level for diagnosis is questionable.

Topical 0.1% tacrolimus significantly improved ear infections in cats.

The arrector pili muscle might play a role in hair loss and needs more research to understand its impact.

Testosterone therapy may slightly improve sexual function in postmenopausal women, but its long-term safety is unknown.

SHBG binding properties are unchanged in male liver cirrhosis patients.

Different types of dog hair loss are linked to problems starting the hair growth phase and early hair cycle ending.

The document concludes that primary scarring alopecias cause permanent hair loss, have unpredictable outcomes, and lack definitive treatments, requiring personalized care.

Menopausal women have higher androgen levels, which can cause symptoms like facial hair growth and low sexual desire.

Finasteride treats enlarged prostate and baldness, but may cause limited urinary improvement and sex-related side effects.

Early stage bald spots are linked to skin inflammation and damage to the upper part of the hair follicle.

Many elderly women experience unwanted facial hair and various hair loss conditions, with treatments available for each condition.

Birth control pills help treat skin and hair growth problems linked to high male hormone levels.

Aging scalp skin contributes to hair aging and loss, and more research is needed to develop better hair loss treatments.