15 citations
,
August 2010 in “Annals of saudi medicine/Annals of Saudi medicine” Hair tourniquet syndrome is a rare condition where hair wraps around an infant's body part, needing quick removal to prevent damage.
9 citations
,
January 1966 A runner developed tangled armpit hairs from shirt friction, preventable by shaving or wearing smooth shirts.
March 2026 in “International Journal of Advanced Biochemistry Research” German shepherd hair varies in color and pattern but is flat with a consistent internal structure.
21 citations
,
April 2004 in “Australasian Journal of Dermatology” A 3-year-old girl has a rare condition causing sparse hair and nail issues, with minimal improvement from treatment.
May 2023 in “Elsevier eBooks” October 2024 in “Skin Research and Technology” Pili annulati causes zebra-striped hair but doesn't affect hair strength or quality of life.
4 citations
,
January 2017 in “International journal of trichology” Castor oil can cause severe hair matting.
April 2024 in “JEADV. Journal of the European Academy of Dermatology and Venereology/Journal of the European Academy of Dermatology and Venereology” A new change in the WNT10A gene caused a condition leading to short hair growth in a Chinese family.
9 citations
,
July 2008 in “Archives of Dermatological Research” August 2011 in “SpringerReference” January 2016 in “Case reports in clinical medicine” A 6-year-old girl was diagnosed with a rare hair disorder called monilethrix.
45 citations
,
December 2007 in “The FASEB journal” There are two types of stem cells in rodent hair follicles, each with different keratin proteins.
1 citations
,
January 1989 in “Springer eBooks” August 2024 in “Archives of Dermatological Research” CHI3L1 and CXCL5 proteins help promote hair growth.
July 2025 in “Journal of Investigative Dermatology” Secreted inhibitors of Wnt and IGF signaling control hair and tooth development, creating species-specific patterns.
43 citations
,
August 2018 in “Cell Stem Cell” Hoxc genes control hair growth through Wnt signaling.
8 citations
,
October 2010 in “Advances in plant biology”
12 citations
,
November 2014 in “PLOS Computational Biology” The study concluded that hair growth in mice is regulated by a stable interaction between skin cell types, and disrupting this can cause hair loss.
72 citations
,
May 1993 in “The Journal of Cell Biology” Trichohyalin in sheep hair follicles may help with structure and calcium binding.
142 citations
,
February 2016 in “Science” Foxc1 helps keep hair follicle stem cells inactive, preventing hair loss.
114 citations
,
May 2001 in “Development” Overexpression of Hoxc13 in hair cells causes hair loss and skin issues.
2 citations
,
May 2018 in “Journal of Investigative Dermatology” Mice can regrow hair on wounds due to specific cell interactions and mechanical forces not seen in rats.
2 citations
,
October 2022 in “Journal of structural biology” Older thin hair is not just thinner but also has different shape, structure, and stiffness.
53 citations
,
October 2003 in “Genetics” The mK6irs1/Krt2-6g gene likely causes wavy hair in mice.
5 citations
,
October 2012 in “CMAJ. Canadian Medical Association journal” The girl had harmless hair casts, not lice.
April 2020 in “International Journal of Cosmetic Science” The study found that minor protein differences between curved and straight Japanese hair are unlikely to significantly affect hair structure.
144 citations
,
May 1990 in “Journal of the American Academy of Dermatology” 15 citations
,
January 1989 in “European Journal of Cancer and Clinical Oncology”