April 2016 in “Journal of the American Academy of Dermatology” A 4-year-old girl had a rare hair disorder affecting only part of her scalp.
November 2025 in “Skin Health and Disease” Autosomal recessive woolly hair is rare and involves tightly coiled hair without other health issues.
June 2026 in “Journal of Applied Animal Welfare Science” Social hair plucking in rhesus macaques is linked to grooming, aggression, and health issues like hair loss, especially in females and lower-ranked individuals.
245 citations
,
January 1998 in “Genes & Development” Hoxc13 gene is essential for hair, nail, and papilla development.
7 citations
,
January 2012 in “International Journal of Trichology” A man with Woolly Hair Syndrome had very curly, fragile hair, and doctors used a special scalp examination to diagnose him without invasive tests.
4 citations
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April 2018 in “The journal of pediatrics/The Journal of pediatrics” A 6-year-old girl's inability to grow her hair long was due to Loose Anagen Hair Syndrome, which causes hair to shed easily and may improve with age.
Social hair plucking in rhesus macaques is an abnormal behavior with both social and aggressive traits, affecting health.
29 citations
,
June 2005 in “Journal of Zoo and Wildlife Medicine” Most hair loss in captive rhesus macaques is likely due to environmental and behavioral factors.
161 citations
,
July 2003 in “ACM Transactions on Graphics” Researchers developed a new model for more realistic computer graphics rendering of hair by considering how light scatters on hair fibers.
8 citations
,
January 2020 in “PeerJ” Alopecia Areata causes significant structural and compositional changes in hair.
September 2017 in “Pediatric Dermatology” A 14-year-old boy was diagnosed with a rare hair condition that may lead to hair thinning and has no known effective treatments.
July 2025 in “Dermatology Practical & Conceptual” A 2-year-old boy has a rare hair disorder causing brittle hair and hair loss, which may improve with age.
2 citations
,
December 2004 in “Medicine” Different hair and scalp disorders cause hair loss or excess hair growth, with various treatments available depending on the specific condition.
March 2021 in “CRC Press eBooks” Hair loss without scarring is more common than permanent hair loss with scarring, and is often due to genetic factors.
June 2023 in “The Journal of Family Practice” The hair loss is likely due to a fade haircut.
10 citations
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May 2010 in “Journal of The American Academy of Dermatology” A 38-year-old African American woman has a rare condition that prevents her from growing long hair.
5 citations
,
November 2011 in “Journal of Cutaneous Medicine and Surgery” Hairless dogs can be used to study human hypertrophic scars.
November 2014 in “British Journal of Dermatology” Male hair loss is mainly due to thinner hair, not less hair.
3 citations
,
January 2021 in “Veterinary dermatology” A litter of cats had a hair condition similar to a mouse mutation, leading to hair loss and abnormal hair and skin.
A runner developed tangled armpit hairs from shirt friction, preventable by shaving or wearing smooth shirts.
13 citations
,
January 2014 in “Postępy Dermatologii i Alergologii” Patchy alopecia areata can affect only pigmented hairs, leaving gray hairs untouched.
30 citations
,
April 2009 in “Dermatologic Surgery” TrichoScan helps identify subtle hair thinning in women with androgenetic alopecia.
2 citations
,
January 2000 in “Journal of Toxicologic Pathology” A single recessive gene causes sparse hair in certain Japanese White rabbits.
2 citations
,
June 1980 in “International Journal of Dermatology” Scalp biopsies are important for diagnosing hair loss conditions.
February 2022 in “CRC Press eBooks” Hair disorders include hair loss, excessive hair growth, and ingrown hairs, with various treatments available depending on the cause.
5 citations
,
January 2009 in “International Journal of Trichology” Two siblings had a rare hair condition with banded hair, which doesn't need treatment.
11 citations
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June 2005 in “Postgraduate Medical Journal” Some infants temporarily grow scrotal hair, which usually disappears on its own without any health issues.