Canine fetal hair follicle stem cells show pluripotency, with higher S100 protein expression at 40 days.
Finasteride can reduce prostate cancer risk but may delay diagnosis and cause sexual side effects.
July 2014 in “Journal of the Portuguese Society of Dermatology and Venereology” Trichoscopy is useful for diagnosing and monitoring hair and scalp conditions.
February 2014 in “Medicine - Programa De Formación Médica Continuada Acreditado” The document concludes that non-scarring alopecias can be reversed, but scarring alopecias cause permanent hair loss.
6 citations
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July 2017 in “Case Reports” Hair loss, known as androgenic alopecia, can start in teenage years and may not always be hormone-related. It's important to do extra tests in young cases and remember it can greatly affect a teenager's mental health.
June 2018 in “Advances in Cosmetic Surgery” Hair loss caused by genetics and hormones; more research needed for treatments.
55 citations
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October 1992 in “Archives of Dermatology” Loose Anagen Hair Syndrome is a hereditary condition causing hair loss in children due to abnormal hair follicles.
4 citations
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August 2021 in “Pediatric dermatology” Biotin, alone or with minoxidil, effectively treats short anagen syndrome.
4 citations
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October 2018 in “Experimental Dermatology” Dermoscopy shows that diffuse alopecia areata progresses through specific hair growth stages.
June 2011 in “European Journal of Pediatric Dermatology” An 11-year-old girl with hair thinning was diagnosed with monilethrix and early androgenetic alopecia.
July 2025 in “Journal of Investigative Dermatology” Miniaturized hair follicles in androgenetic alopecia show abnormal mitochondrial activity and damage.
October 2025 in “Annals of Medicine and Surgery” Retinoids may improve hair growth in androgenic alopecia when used with other treatments.
32 citations
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December 1965 in “The Lancet” Argininosuccinic aciduria can cause hair loss.
3 citations
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November 1999 in “Journal of Cutaneous Medicine and Surgery” AGA is a genetic, hormonal hair loss treated with finasteride, minoxidil, and supplements, but new compounds are being developed.
1 citations
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May 2017 in “InTech eBooks” Hair loss in Androgenetic alopecia (AGA) is due to altered cell sensitivity to hormones, not increased hormone levels. Hair growth periods shorten over time, causing hair to become thinner and shorter. This is linked to miscommunication between cell pathways in hair follicles. There's also a change in gene expression related to blood vessels and cell growth in balding hair follicles. The exact molecular causes of AGA are still unclear.
January 2018 in “Springer eBooks” Telogen Effluvium causes more hair loss because hair moves to the resting phase too soon.
4 citations
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May 2017 in “Pediatric Dermatology” The study found that Short Anagen Syndrome results in short hair growth not due to hair fragility, and hair may grow longer after puberty.
15 citations
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March 1996 in “PubMed” Anorexia nervosa may cause a hair defect called pili torti due to malnutrition and high vitamin A levels.
September 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” Some hair growth cells remain in partially bald areas of Indian men with hair loss.
120 citations
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November 2014 in “Biological Reviews” The telogen phase of hair growth is active and important for preparing hair follicles for regeneration, not just a resting stage.
40 citations
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January 2010 in “International Journal of Trichology” Loose Anagen Syndrome is a hair condition where hairs can be easily pulled out, mainly affecting young girls, and may improve on its own or with treatment.
1 citations
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January 1997 in “Archives of Dermatology” Hair loss from alopecia areata can sometimes regrow in a pattern similar to androgenetic alopecia.
December 1990 in “PubMed” Topical 17 alpha-propylmesterolone increases hair cell growth in androgenetic alopecia.
19 citations
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August 2019 in “Expert Opinion on Therapeutic Targets” New treatments for hair loss may target specific pathways and generate new hair follicles.
January 2007 in “Revista del Centro Dermatológico Pascua” Hair loss in women, often not related to male hormones, increases with age and can cause significant emotional distress.
20 citations
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October 2008 in “Archives of dermatological research” Angiogenin helps hair grow by stimulating cell growth and blood vessel formation.
2 citations
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July 2013 in “PubMed” The pubic hair loss was likely due to anorexia nervosa.
35 citations
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October 2006 in “Journal of Dermatology” Teen hair loss common in boys, linked to family history and mild symptoms.
1 citations
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January 2004 in “Journal of Clinical Dermatology” Young people with mild hair loss may experience it due to social stress.
49 citations
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September 2012 in “The Journal of clinical endocrinology and metabolism/Journal of clinical endocrinology & metabolism” The document concludes with guidance for doctors on diagnosing and treating hirsutism effectively and safely.