52 citations
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June 1991 in “Journal of Virology” The hamster polyomavirus middle T antigen is linked to tumors in hamsters and associates with a specific tyrosine kinase.
7 citations
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January 2015 in “PubMed” Ultrasound biomicroscopy is useful for viewing hair follicles in alopecia areata.
22 citations
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January 2006 in “Journal of Structural Biology” Hair follicles form hard α-keratin filaments in four steps, showing structural differences.
May 1961 in “Tumori Journal” Vitamin A treatment reduced abnormal cell growth and improved skin conditions in rats with tumors.
49 citations
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September 2004 in “Journal of the European Academy of Dermatology and Venereology” Careful light microscopy is crucial for detecting mild cases of pili annulati, which weakens hair and varies widely in expression.
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.
6 citations
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February 2016 in “American Journal of Dermatopathology” The boy with woolly hair nevus had thinner hair and abnormal hair follicles, which improved with treatment but worsened when treatment stopped.
August 2011 in “SpringerReference”
85 citations
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February 1989 in “Journal of The American Academy of Dermatology” Children with loose anagen hair have easily pluckable hair due to root sheath problems, and it might improve without treatment.
13 citations
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September 2011 in “Archives of dermatology” A patient with steroid sulfatase deficiency had a unique hair pattern and a brain malformation not previously linked to the condition.
158 citations
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November 1998 in “Cell” β-catenin affects hair growth and can lead to tumors, needing more research for better understanding.
2 citations
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July 2016 in “Veterinary dermatology” Hyperaesthetic leucotrichia in horses causes painful, recurring skin lesions and hair color changes, especially in Arabian and American paint horses.
August 2024 in “Journal of Small Animal Practice” A cat lost hair on its back a month after a road accident, despite no initial skin injuries.
Onychomatricoma is a unique nail tumor, not related to other hair-related tumors.
4 citations
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November 2016 in “The Journal of Dermatology” Pili torti hair is fragile due to loose keratin filaments and weak disulfide bonds.
4 citations
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September 2019 in “Journal of Biomedical Optics” Medulla loss in scalp hair could help detect breast cancer.
11 citations
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November 1991 in “Journal of Neuropathology & Experimental Neurology” Brindled mice show abnormal catecholamine neuron development due to copper deficiency.
8 citations
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January 2014 in “Indian Journal of Paediatric Dermatology” Congenital atrichia with papular lesions causes permanent hair loss and skin bumps from birth.
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
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January 2004 in “Sen i Gakkaishi” Human hair and nail proteins are unlikely to cause allergic reactions.
13 citations
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October 2008 in “PubMed” Japanese women's curved hair has an uneven internal structure and varying amino acid composition.
December 2025 in “International Journal of Advanced Biochemistry Research” Malvi cattle hair varies in color and pattern across different body regions.
55 citations
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November 2010 in “Development” Hair follicles in mutant mice self-organize into ordered patterns within a week.
86 citations
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October 2013 in “Dermatologic Clinics” Trichoscopy is a useful non-invasive method for diagnosing different hair loss conditions.
Curly wool has more orthocortex than straight wool.
16 citations
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September 2009 in “Schweizer Archiv für Tierheilkunde” Adrenal tumors can cause high progesterone levels, mimicking symptoms of high cortisol.
December 2009 in “Journal of Veterinary Clinics” The dog's back mass was a keratoacanthoma with inflammation, successfully removed without recurrence.
95 citations
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October 2007 in “International Journal of Dermatology” A new method accurately classifies hair types, showing global hair diversity.
50 citations
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January 1986
8 citations
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February 2005 in “British Journal of Haematology” Chemotherapy caused the patient's hair to have alternating thick and thin segments.