29 citations
,
August 2005 in “Biopolymers” L-cysteine slows down the breaking of bonds in hair due to electrostatic interactions.
36 citations
,
December 2004 in “British Journal of Dermatology” The cyst had unusual keratin spherules and resembled bone marrow.
10 citations
,
July 1984 in “British Journal of Dermatology” Epidermal cysts come from the skin, while pilar cysts come from hair follicles.
40 citations
,
July 2015 in “Journal of Cellular Biochemistry” Cysteine helps maintain keratin production in skin cells even when iron is low.
36 citations
,
November 2019 in “Molecular biology and evolution” Cysteine-rich keratins evolved independently in mammals, reptiles, and birds for hard skin structures like hair, claws, and feathers.
26 citations
,
March 1995 in “Differentiation” A rabbit gene important for hair development was identified and detailed.
1 citations
,
January 1992 in “DNA sequence” Researchers found a non-functional sheep keratin gene due to mutations.
24 citations
,
October 2019 in “Genes” A new sheep gene, KRTAP36-1, may help breed sheep with better wool by reducing prickle factor.
3 citations
,
January 1989 in “The Nishinihon Journal of Dermatology” A hair cyst can become cancerous, showing specific keratins from the hair sheath.
8 citations
,
April 2014 in “Clinical and Experimental Dermatology” Eruptive vellus hair cysts likely originate from the infrainfundibulum and sebaceous duct.
January 2015 in “Turkiye Klinikleri Journal of Dermatology” Peripilar keratin casts are a helpful sign for diagnosing traction alopecia.
35 citations
,
September 1994 in “Journal of Investigative Dermatology”
1 citations
,
December 2021 in “Kathmandu University medical journal” Adult earlobe can have a benign cyst that is usually removed by surgery.
21 citations
,
June 1992 in “Pediatric Dermatology” Eruptive vellus hair cysts are often underreported and need histologic confirmation for accurate diagnosis.
November 2023 in “International surgery journal” A man's neck lump was a trichilemmal cyst, not cancer, and should be fully removed due to rare risk of becoming malignant.
54 citations
,
September 1999 in “PubMed” K15 staining helps distinguish basal cell carcinoma from trichoepithelioma.
13 citations
,
January 2012 in “Dermatology” Eruptive vellus hair cysts are rare, benign skin lesions that are hard to treat.
6 citations
,
April 2012 in “Journal of Oral Pathology and Medicine” Rushton's hyaline bodies form from hair keratin and blood substances.
5 citations
,
January 2014 in “Journal of Cutaneous and Aesthetic Surgery” A woman had 13 non-cancerous cysts on her scalp successfully removed in one surgery.
5 citations
,
January 2011 in “Journal of the Korean Association of Oral and Maxillofacial Surgeons” A woman developed a cyst in her parotid gland after a botox injection, which was successfully removed with surgery.
January 2026 in “Indian Journal of Ophthalmology - Case Reports” Trichilemmal cysts can appear on children's eyelids and may be mistaken for other conditions.
Surgery can cause skin cysts in dogs.
September 2021 in “The journal of investigative dermatology/Journal of investigative dermatology” Three genes linked to the development of trichilemmal cysts were found.
May 2024 in “Indian journal of child health” A 7-year-old girl had a non-painful skin growth at her belly button, which was removed and identified as a keratinous cyst.
119 citations
,
August 2008 in “BMC Evolutionary Biology” KRTAP genes evolved early in mammals, leading to diverse hair traits.
3 citations
,
May 2024 in “Amino Acids” Disrupted cysteine metabolism may cause hair breakage in Alopecia Areata, suggesting potential treatments like N-acetylcysteine.
January 2026 in “Biomaterials and Biosystems” Keratin from chicken feathers can be safely used on damaged skin.
January 2026 in “Digitalen Hochschulbibliothek Sachsen-Anhalt (Universitäts- und Landesbibliothek Sachsen-Anhalt)” Keratin from chicken feathers can be safely used for skin benefits.
6 citations
,
August 2011 in “Anais Brasileiros de Dermatologia” Vellus hair cysts can cause acne-like bumps that don't respond to treatment.
2 citations
,
January 2022 in “International journal of trichology” Eruptive vellus hair cysts are often missed in diagnoses.