40 citations
,
February 1990 in “Journal of The American Academy of Dermatology” A 17-year-old developed woolly hair nevus in adolescence, which is unusual, and over time the hair darkened and straightened slightly, but microscopic changes persisted.
103 citations
,
December 1986 in “Journal of Investigative Dermatology” 2 citations
,
August 2008 in “Oncotarget” Apoptosis in hair follicles spreads through cell death signals, with stem cells slowing the process.
8 citations
,
July 2014 in “American Journal of Dermatopathology” Cutaneous keratocyst and steatocystoma should be called "sebaceous duct cyst" due to their similarities.
122 citations
,
April 1995 in “Journal of Cutaneous Pathology” The document describes how to tell different types of non-scarring hair loss apart by looking at hair and scalp tissue under a microscope.
December 2023 in “Journal of dermatology” The study concluded that key signs of Keratosis follicularis spinulosa decalvans are changes in terminal hair and vellus hair follicles, which likely start the inflammation and damage to hair follicles.
August 1993 in “Journal of Dermatological Science” Testosterone metabolism in balding scalp cells may not be the main cause of hair loss.
Stem cells play a key role in nonmelanoma skin cancers, with different origins and genetic changes linked to basal and squamous cell carcinomas.
A man's scalp hair loss was due to a combined melanocytic nevus and alopecia areata, suggesting a possible link between the two conditions.
2 citations
,
June 2001 in “Medical Electron Microscopy” Trichilemmal cysts may form from hair follicle outer root sheath growth.
9 citations
,
November 1993 in “Journal of The American Academy of Dermatology” Some men can have female pattern baldness without hormonal abnormalities or signs of feminization.
December 2025 in “Russian Journal of Skin and Venereal Diseases” Thinner hair follicle structures are linked to non-scar alopecia.
9 citations
,
June 2017 in “Journal of Cutaneous Pathology” People with pemphigus vulgaris and pemphigus foliaceus often have smaller sebaceous glands on their scalp.
December 2020 in “Skin appendage disorders” A young man with an unusual type of scarring hair loss suggests a possible new variant of a known scalp condition.
September 1997 in “Journal of The European Academy of Dermatology and Venereology” Examining scalp tissue under a microscope helps diagnose and understand hair loss diseases.
63 citations
,
May 2011 in “Clinical cancer research” The topical inhibitor CUR61414 was not effective in treating basal cell carcinoma in human trials.
March 2024 in “Tissue and cell/Tissue & cell” Telomerase-positive cells are mainly in the bulb matrix and outer root sheath of hair follicles.
1 citations
,
February 2015 in “Revista Acadêmica Ciência Animal” A mare had a functional ovary with a tumor containing cartilage and bone.
6 citations
,
April 1996 in “Journal of histochemistry and cytochemistry/The journal of histochemistry and cytochemistry” TGF-alpha is present in sheep and ferret skin and may affect hair growth without directly stimulating cell proliferation.
January 2021 in “touchREVIEWS in Endocrinology” Surgery successfully treated a hidden ovarian tumor causing hair loss and excess hair growth in a postmenopausal woman.
November 2022 in “Journal of the Endocrine Society” A rare ovarian tumor caused high testosterone and excess hair in a woman, which was resolved after tumor removal.
17 citations
,
May 1987 in “Clinical and Experimental Dermatology” A patient with Sézary syndrome showed improvement after treatment and the study suggested follicular mucinosis might indicate future lymphoma risk.
May 2020 in “Research Square (Research Square)” Trichilemmal carcinoma shares genetic traits with other skin cancers, suggesting similar treatment options.
92 citations
,
May 2004 in “Journal of Investigative Dermatology”
September 2025 in “bioRxiv (Cold Spring Harbor Laboratory)” Basement membrane supports fibroblast aggregation, aiding hair follicle development.
The human scalp has different types of pigment cells in hair follicles with varying abilities to produce pigment.
January 2025 in “Dermatology Review” Trichilemmal carcinoma is rare, usually benign after removal, but needs close follow-up due to recurrence risks.
25 citations
,
June 2022 in “Developmental cell” Overactivating Hedgehog signaling makes hair follicle cells in mice grow hair faster and create more follicles.
8 citations
,
April 2020 in “Facial Plastic Surgery Clinics of North America” Follicular Unit Transplantation is a reliable hair restoration method with a high success rate and minimal scarring.
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.