December 2025 in “Brazilian Journal of Hair Health” The Spiral Model helps understand hair growth changes with age and identify hair problems early.
26 citations
,
December 1979 in “Journal of Cutaneous Pathology” Seborrheic keratoses may partly come from hair follicle cells.
January 2022 in “Clinical Cases in Dermatology” A woman's scalp nodule was a common, harmless pilar cyst, treated by surgical removal.
5 citations
,
March 1981 in “PubMed” A girl grew extra hair in areas where she had insect bites.
1 citations
,
August 2016 in “Dermatology - Open Journal” Mitochondria change shape to meet energy needs during cell movement.
August 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” The research found that specific stem cells maintain skin gland openings and that disrupting their activity can cause blockages or early cancer signs, indicating a need for targeted treatments.
June 2026 in “Journal of Experimental Botany” Root hair growth is influenced by cell wall dynamics and various cellular factors.
45 citations
,
February 2013 in “The Journal of Dermatology” Keratoacanthoma and some squamous cell carcinomas are linked to hair follicles, while others are not.
March 2022 in “Veterinary dermatology” A one-year-old cat had multiple benign skin tumors similar to those known in humans.
12 citations
,
July 2019 in “Veterinary Dermatology” Nestin-expressing progenitor cells become outer root sheath keratinocytes.
1 citations
,
February 2009 in “Journal of Investigative Dermatology” VEGF helps squamous cell carcinoma grow in ways beyond just blood vessel formation.
58 citations
,
December 1992 in “British Journal of Dermatology” Rat hair follicles grow longer in vitro, but certain factors can inhibit this growth.
August 2018 in “Pediatric Dermatology” A baby had a unique skin condition with a pale patch and surrounding dark hairs, not linked to other health issues.
January 1992 in “Proceedings of the New Zealand Society of Animal Production” Ferret hair growth starts between 0 and 4 days after melatonin treatment, with cell growth peaking in the hair germ and declining as the hair matures.
October 2025 in “Journal of the Endocrine Society” A rare pituitary tumor in an 18-year-old male caused hormonal issues and vision loss, requiring surgery and further treatment.
47 citations
,
January 1998 in “Molecular Carcinogenesis” ErbB2 signaling is crucial for skin cell growth and cancer development in mice.
5 citations
,
July 2005 in “British journal of dermatology/British journal of dermatology, Supplement” A man grew hair on his penis, which is not common, and needed surgery to remove it.
1 citations
,
March 1998 in “Journal of Dermatological Science” April 2018 in “Dermatologic Surgery”
31 citations
,
May 2015 in “Stem Cell Reports” Stem cells and their surrounding environment in hair follicles work closely together, affecting hair growth and having implications for cancer and tissue regeneration.
87 citations
,
January 1999 in “British Journal of Dermatology” Trichoblastic fibroma and basal cell carcinoma are similar but different from trichoepithelioma.
6 citations
,
January 1985 in “ACTA HISTOCHEMICA ET CYTOCHEMICA” Tumor cells in calcifying epithelioma of Malherbe resemble hair follicle cells.
18 citations
,
December 1992 in “Journal of Cutaneous Pathology” Skin tumors and normal skin structures have different lectin-binding patterns.
40 citations
,
March 2017 in “The journal of investigative dermatology/Journal of investigative dermatology” Growing hair follicles have high mitochondrial activity and ROS in specific regions, aiding hair formation.
512 citations
,
February 2008 in “Science” Reactive oxygen species and calcium create a feedback loop that shapes root hair cells.
April 2025 in “Indian Journal of Paediatric Dermatology” Trichorrhexis invaginata can occur with tinea capitis, though it's rare.
1 citations
,
June 2021 in “bioRxiv (Cold Spring Harbor Laboratory)” Activating β-catenin in mammary cells leads to changes that cause early-stage abnormal growths similar to skin structures.
June 2022 in “IP Indian journal of clinical and experimental dermatology” Benign skin adnexal tumors are more common than malignant ones, with trichoepithelioma and chondroid syringoma being the most frequent types.
18 citations
,
January 2009 in “Experimental Dermatology” mTOR may link different pathways in hair follicle tumor formation.
November 2025 in “Journal of Skin and Sexually Transmitted Diseases” Trichofolliculoma was found in a person with amniotic band syndrome for the first time.