February 2021 in “PubMed” A 2-year-old girl had a hair disorder not shared by her identical twin.
January 2019 in “日本皮膚科学会雑誌” 1 citations
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June 1998 in “Journal of Forestry Research” Mammalian hair scales change from smooth to wavy due to friction.
1 citations
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September 2020 in “Journal of dermatology” Researchers found a new mutation in the LIPH gene of a woman with a rare hair condition.
1 citations
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September 2020 in “Journal of Dermatological Science” The gene LRRC15 is more active in balding areas of the scalp compared to non-balding areas.
July 2025 in “Frontiers in Medicine” Mutations in the LIPH gene cause woolly hair in a child.
4 citations
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January 2020 in “Indian dermatology online journal” Lichen simplex chronicus on the scalp can be diagnosed by specific hair and skin signs and treated with corticosteroids and therapy.
July 2009 in “International Journal of Cosmetic Science” Japanese women's curved hair has an uneven internal structure and varied amino acid composition.
47 citations
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April 2000 in “Experimental Dermatology” A new gene mutation causes a rare type of hair loss.
April 2021 in “The journal of investigative dermatology/Journal of investigative dermatology” Lichen planopilaris in men often affects the scalp, eyebrows, arms, legs, and beard, with many having family members with hair loss.
September 1972 in “大会学術講演梗概集. 構造系” The document explains common hair disorders and the basics of hair anatomy and life cycle.
September 2021 in “CRC Press eBooks” Lichen planopilaris causes permanent hair loss and scarring due to damage to hair follicles and can be mistaken for other hair loss conditions.
4 citations
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October 2011 in “Pediatric dermatology” Head lice can cause unusual patchy hair loss.
19 citations
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March 2013 in “Journal of Cutaneous Pathology” The study found unique skin changes in a rare type of alopecia linked to a skin condition called linear morphea.
September 2014 in “Journal of the American Academy of Dermatology” The girl likely has Loose anagen hair syndrome, which may improve on its own or with minoxidil.
30 citations
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May 2008 in “International Journal of Dermatology” Lipedematous alopecia causes permanent hair loss due to increased scalp fat.
January 2012 in “International Journal of Trichology” Two siblings have a rare genetic condition causing curly, coarse hair.
January 2022 in “Clinical Cases in Dermatology” A 47-year-old man was diagnosed with a specific type of hair loss and advised to use certain medications and avoid hair transplants.
January 2026 in “Cosmoderma” A 9-year-old girl has a rare hair disorder causing beaded, sparse hair.
1 citations
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March 1991 in “PubMed” Naevoid bundle hair is an unusual hair growth pattern where multiple hairs fuse together.
September 2016 in “Journal of Dermatological Science” Certain gene mutations in Japanese people are linked to different types of hair loss, with some causing mild hair thinning and others leading to complete baldness.
58 citations
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November 1969 in “British Journal of Dermatology” Netherton's disease causes multiple hair defects.
3 citations
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April 2016 in “International Journal of Dermatology” A young man was diagnosed with trichoepitheliomas, causing thick skin and hair loss.
2 citations
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May 2018 in “European Journal of Dermatology” Lupus erythematosus panniculitis on the scalp can cause unique geometric hair loss patterns.
1 citations
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March 2010 in “Internal medicine journal” A 72-year-old man with sudden taste issues and hair growth was diagnosed with a severe stomach cancer and died within 5 months.
31 citations
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December 2010 in “Journal of the American Academy of Dermatology” Loose anagen hair syndrome is caused by structural abnormalities in the hair follicle's inner root sheath.
April 2017 in “Journal of Investigative Dermatology” Sweat glands and hair follicles are determined by opposing signals, with BMPs promoting sweat glands and blocking BMPs leading to hair follicles.
November 2023 in “Scientific Reports” A gene mutation in Lama3 is linked to a common type of hair loss.