15 citations
,
February 1999 in “The anatomical record” Some mutant mice have hair with abnormal cross-linking, mainly in the cuticle, not affecting other hair parts.
4 citations
,
April 1983 in “The Journal of Dermatology” A 15-year-old girl with hypothyroidism had excess hair and skin issues due to blocked hair follicles.
19 citations
,
December 2006 in “Archives of dermatology” Hair casts and cutaneous spicules can be signs of multiple myeloma.
January 2006 in “DOAJ (DOAJ: Directory of Open Access Journals)” Loose anagen hair syndrome causes easily pulled, thin hair in kids but is harmless and temporary.
3 citations
,
January 2014 in “Indian dermatology online journal” Hair casts can be mistaken for lice, so correct identification is important.
28 citations
,
January 1985 in “Journal of the American Academy of Dermatology” A girl with citrullinemia developed pili torti, suggesting a link between the hair condition and the metabolic disorder.
1 citations
,
January 2018 in “Jornal Brasileiro de Patologia e Medicina Laboratorial” Monilethrix causes brittle hair and hair loss, and it runs in families.
16 citations
,
April 2017 in “ACM Transactions on Graphics” Light scatters differently from elliptical hair fibers than from circular ones, and a new model better predicts this behavior, especially for shiny highlights.
January 2002 in “Proceedings of The Japanese Society of Animal Models for Human Diseases” Keratin2-6g is crucial for hair follicle development, with mutations causing cell degeneration and vacuolation.
January 2020 in “Journal of oral medicine and oral surgery” Hair grew in a man's mouth due to a rare condition called heterotopia.
December 2021 in “Molecular genetics and genomics” Cats with abnormal hair had DSG4 gene changes causing hair problems.
2 citations
,
February 2021 in “FEBS open bio” Human hair keratins K85 and K35 create unique filament patterns important for early hair formation.
November 2024 in “Journal of Microscopy” Human hair varies in structure based on curl type, with high curl hair showing the most differences.
January 2006 in “Seibutsu Butsuri” Curly and straight hair differ in how their internal fibers are arranged.
5 citations
,
February 2019 in “PloS one” Bald thigh syndrome in sighthounds is caused by structural defects in hair shafts due to downregulated genes and proteins.
7 citations
,
October 2017 in “Journal of exotic pet medicine” A guinea pig with ovarian cysts had a uterine infection and abnormal uterus lining due to a piece of hay inside it.
55 citations
,
February 2014 in “Journal of Structural Biology” Human hair has a complex, variable structure with a consistent matrix and double-twist pattern.
Wavy sinus hairs in cats are linked to feline leukemia virus infection.
2 citations
,
August 2022 in “The journal of investigative dermatology/Journal of investigative dermatology” A specific mutation in the K25 gene causes a rare genetic disorder with curly hair at birth and later hair loss, along with dental issues.
8 citations
,
May 2005 in “The American journal of dermatopathology/American journal of dermatopathology” The hair defect is due to abnormal inner root sheath keratinization.
May 2019 in “Small Animal Dermatology” The cat had a rare condition linked to cancer, leading to its euthanasia.
85 citations
,
October 2007 in “International Journal of Dermatology” Curly hair shape is due to uneven growth patterns in the hair follicle.
9 citations
,
January 2011 in “EXPERIMENTAL ANIMALS” A new rat strain with a specific gene mutation causes hair loss and kidney issues.
36 citations
,
July 1988 in “Archives of Dermatological Research” Pili annulati is caused by a protein metabolism disorder affecting hair structure.
The "sinuskissen" in cat hair follicles is mostly connective tissue, affecting fluid flow.
May 2024 in “Frontiers in medicine” A genetic mutation in the LIPH gene causes tightly curled hair that stops growing in some Japanese individuals.
January 2024 in “International Journal of Trichology” Matted hair should not be judged as a sign of mental instability; proper diagnosis and gentle care are key.
1 citations
,
January 2013 in “International Journal of Trichology” A girl with red hair developed hair-pulling and body image disorders after being bullied for her hair color.
24 citations
,
December 1990 in “Pediatric Dermatology” Tight hairstyles like ponytails may cause hair casts by affecting scalp circulation and causing inflammation.