January 1962 in “Archives of Dermatology” A 5-year-old girl has lipoid proteinosis, causing voice issues, hair thinning, skin lesions, and tongue movement problems.
2 citations
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February 2021 in “FEBS open bio” Human hair keratins K85 and K35 create unique filament patterns important for early hair formation.
December 2025 in “IP Indian Journal of Clinical and Experimental Dermatology” Hair shaft disorders often indicate genetic or systemic issues and are managed by minimizing damage.
September 2025 in “Cureus” Early recognition and multidisciplinary management are crucial for improving outcomes in Parry-Romberg syndrome.
10 citations
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July 2001 in “PubMed” A new type of pachyonychia congenita may exist, caused by a different keratin mutation.
May 2025 in “Journal of Developmental Biology” Jawless vertebrates have teeth proteins similar to those in mammalian hair and nails.
June 2026 in “Skin Appendage Disorders” Pili annulati may be more common than thought, so recognizing its features is important for diagnosis.
11 citations
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February 1989 in “Journal of veterinary medicine. Series A” Crossbreeding certain European cattle breeds may cause hair and physical issues in cattle.
6 citations
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October 2006 in “International Journal of Dermatology” Hair splitting and nail detachment are linked conditions.
Yak hair stretches mainly due to macromolecules slipping past each other.
June 2021 in “International journal of research in dermatology” Shaving and avoiding brushing improved the patient's beard hair condition.
May 2015 in “Journal of The American Academy of Dermatology” A woman with Parry-Romberg syndrome developed new curly hair on one side of her scalp, a condition not previously linked to the syndrome.
March 2026 in “Dermatology Online Journal” Cystic panfolliculoma is a rare, harmless tumor that can be confused with other skin tumors.
30 citations
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May 2005 in “Pediatric dermatology” Some families have a genetic condition where they are born with irregular scalp defects.
46 citations
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August 1977 in “Journal of Morphology” The big-clawed shrew's sinus hair follicles are highly specialized for sensing vibrations.
19 citations
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May 2004 in “The American Journal of Dermatopathology” The research found that a specific gene mutation causes fewer hair follicles and disrupted hair growth cycles, leading to thin and short hair in people with Hypotrichosis with Juvenile Macular Dystrophy.
2 citations
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August 2014 in “Archivos argentinos de pediatría” A 6-year-old girl with Turner syndrome also had psoriasis, alopecia areata, and trachyonychia.
December 2025 in “Cureus” SLE can occur in young males and cause knee pain.
3 citations
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January 1988
3 citations
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January 2022 in “Medical Mycology Journal” Malassezia fungi in healthy noses can form a "spaghetti-and-meatballs" structure.
20 citations
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December 2010 in “Journal of Morphology” Lizard claws have hair-like keratins similar to those in mammals.
2 citations
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June 2003 in “American Journal of Dermatopathology” A unique case of skin cancer showed unusual calcification, possibly linked to calcium-binding proteins.
February 2013 in “Pediatrics in Review” The girl's symptoms suggest a complex condition that's hard to diagnose despite normal test results.
August 2009 in “Mechanisms of Development” September 2012 in “Annals of saudi medicine/Annals of Saudi medicine” The twins' condition is unique and doesn't match any known syndromes.
2 citations
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January 2000 in “Journal of Toxicologic Pathology” A single recessive gene causes sparse hair in certain Japanese White rabbits.
2 citations
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May 2020 in “Journal of the American Academy of Dermatology” Hair shaft changes may be linked to CCCA, but their role is unclear.
1 citations
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January 2020 in “Skin appendage disorders” A family was found with both Trichorhinophalangeal syndrome and Loose Anagen Syndrome, suggesting a genetic connection.
January 2009 in “Nihon Keshouhin Gijutsushakaishi/Journal of S C C./Nihon Keshouhin Gijutsushakai kaishi” Curved human hair has different structures on each side, which might cause its shape and is similar to wool.
35 citations
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September 2004 in “American Journal of Dermatopathology” A rare nail bed cancer was successfully treated with no recurrence after 4 years.