22 citations
,
April 1967 in “Australian Journal of Zoology” Southern elephant seals develop hair follicles and skin layers before birth, with moulting starting a week after birth and finishing in three weeks.
2 citations
,
January 1987 in “PubMed” Woolly hair syndrome is a genetic condition causing frizzy, fragile hair.
Pangolin scales evolved for protection, hardening with age, due to keratin gene diversification.
2 citations
,
March 1989 in “International Journal of Dermatology”
35 citations
,
November 2010 in “Journal of Cutaneous Pathology” Dilated follicular infundibula and increased catagen/telogen follicles are key indicators for diagnosing alopecia areata.
May 2015 in “Journal of the American Academy of Dermatology” New hair after alopecia areata can be thinner and change color but usually keeps the same shape.
2 citations
,
May 2021 in “Scientific Reports” Stress is likely causing hair loss in Formosan macaques.
50 citations
,
March 1992 in “PubMed” Malnutrition causes skin changes due to nutrient deficiencies.
26 citations
,
April 2011 in “British Journal of Dermatology” New mutations in the DSG4 gene cause a rare hair condition.
9 citations
,
July 2010 in “British Journal of Dermatology” The document suggests a rare skin condition might be caused by a genetic phenomenon.
January 2022 in “Clinical Cases in Dermatology” A 4-year-old boy has a rare type of hair loss in a line pattern on his scalp.
15 citations
,
January 2014 in “Dermatology” Some patients with a type of skin lymphoma can experience a rare, non-scarring hair loss that looks like another hair loss condition but has distinct features.
20 citations
,
December 1995 in “Veterinary Dermatology” Yorkshire Terriers with Colour Dilution Alopecia have reduced melanin and hair structure issues.
October 2025 in “HAL (Le Centre pour la Communication Scientifique Directe)” Variegated coat color in cats is linked to the Silver locus.
50 citations
,
October 1918 in “The journal of experimental zoology” Artificially inducing hair regrowth in mice can change the normal pattern and timing of hair growth, with minimal color differences between old and new fur.
23 citations
,
July 1994 in “Journal of Dermatological Science” Pili torti hair twists due to uneven outer root sheath cell development.
December 2023 in “Clinical, cosmetic and investigational dermatology” The study found that white hair in vitiligo has specific patterns and structures, which vary with the stage of the disease and may be similar to another hair condition.
20 citations
,
April 1959 in “A M A Archives of Dermatology” Alopecia mucinosa causes red, raised skin patches and hair loss.
1 citations
,
May 2006 in “Thyroid Research and Practice” Skin can become dry and thick in hypothyroidism.
4 citations
,
January 2017 in “Annals of Dermatology” Frequent hairdryer use may worsen hair fragility in people with Pili Annulati.
3 citations
,
July 2024 in “Animals” Tail tip lesions in dairy cows may be caused by reduced blood flow to the skin.
5 citations
,
January 1998 in “Journal of Toxicologic Pathology” Maneb causes delayed hair follicle damage in rats.
21 citations
,
March 2018 in “American Journal Of Pathology” Mutations in NIPAL4 cause skin issues by disrupting lipid layers, but some improvement is seen with topical treatment.
September 2024 in “Digital Commons - University of South Florida (University of South Florida)” Hormones can change ptarmigan feather color from white to pigmented.
62 citations
,
December 1941 in “Experimental biology and medicine” Eating phenylthiocarbamide made all the rats' hair go gray, but some returned to their original color after stopping.
52 citations
,
November 2003 in “Journal of Investigative Dermatology” Different harmful mutations in the CDH3 gene cause HJMD, but symptoms vary among individuals.
6 citations
,
January 1967 in “Journal of Small Animal Practice” Old dogs' skin thins, loses hair, and may darken, but doesn't show some human aging signs.
June 2024 in “British Journal of Dermatology” A 15-year-old boy was correctly diagnosed with a rare skin condition after initially being misdiagnosed.
33 citations
,
September 2012 in “Australasian Journal of Dermatology” Chemotherapy can cause hair changes similar to alopecia areata, which might lead to misdiagnosis.
October 1967 in “Archives of Dermatology” A 42-year-old woman had a scalp lesion that didn't cause hair loss and showed specific changes under a microscope.