Lichen spinulosus, usually seen in young people, can rarely occur in adults, as shown by a 52-year-old woman with a rough, bumpy rash.
February 2026 in “Nature Communications” Inhibiting connective tissue sheath contraction may improve hair growth in male pattern baldness.
183 citations
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January 2014 in “BioMed Research International” AA-PRP injections effectively increase hair count and thickness for male pattern hair loss.
New treatments for alopecia areata, like JAK inhibitors and immunomodulators, are promising.
105 citations
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December 1998 in “Archives of Dermatological Research” Dermal papilla cells mainly drive blood vessel growth in hair follicles.
February 2013 in “Journal of the American Academy of Dermatology” Follicular red dots can appear where alopecia areata and vitiligo overlap.
October 2024 in “Journal of Cutaneous Pathology” Compound follicles in folliculitis decalvans mainly have active hair follicles.
August 1994 in “Journal of Dermatological Science” 1 citations
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April 1998 in “PubMed” 10 citations
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November 2007 in “Annals of Diagnostic Pathology” A rare benign tumor with hair follicle features was found on a man's trunk.
1 citations
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December 1996 in “Cell Biology and Toxicology”
10 citations
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August 2015 in “Journal of biophotonics” Hair follicles help substances penetrate the skin faster and more effectively.
April 2026 in “Indian Journal of Dermatology” Follicular vitiligo causes hair whitening without skin color change and can be treated for repigmentation.
4 citations
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January 2013 in “Genetics and Molecular Research” VEGF and microvessel density are closely linked and peak during specific hair growth phases in cashmere goats.
11 citations
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June 1985 in “Journal of cutaneous pathology” Examining many sections is key to correctly diagnosing hair follicle disorders.
2 citations
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December 2018 Alopecia frontal fibrosante affects facial vellus hair and can be diagnosed with dermatoscopy.
April 2026 in “American Journal of Dermatopathology” Increased blood vessel growth in lichen planopilaris may signal active disease needing aggressive treatment.
35 citations
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November 2010 in “Journal of Cutaneous Pathology” Dilated follicular infundibula and increased catagen/telogen follicles are key indicators for diagnosing alopecia areata.
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December 1977 in “Virchows Archiv B Cell Pathology”
January 2012 in “Yearbook of Dermatology and Dermatologic Surgery” The study concluded that a 'Swiss cheese' pattern in hair follicles is a useful sign for diagnosing alopecia areata.
March 2024 in “JEADV. Journal of the European Academy of Dermatology and Venereology/Journal of the European Academy of Dermatology and Venereology” Hair transplant surgery using micropunch can cause blood vessel damage similar to vasculitis in some cases.
December 2018 in “European Journal of Pediatric Dermatology/PD. European journal of pediatric dermatology” Segmental vitiligo affects hair follicle melanocytes, causing small, uniform depigmented spots.
9 citations
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December 1996 in “Cell Biology and Toxicology” Hair follicle cells produce VEGF, which can promote blood vessel cell growth and movement.
47 citations
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May 1995 in “Journal of Investigative Dermatology” Hair follicles in people with alopecia have lower levels of a key blood vessel growth protein.
1 citations
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February 2019 in “bioRxiv (Cold Spring Harbor Laboratory)” Lymphatic vessels are essential for hair follicle regeneration and growth.
10 citations
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September 1994 in “International Journal of Dermatology” Three Iranian men had reddish-brown facial pigmentation with no effective treatment.
7 citations
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June 2017 in “Journal of Cutaneous Pathology” Cystic panfolliculoma resembles hair follicle tumors due to specific cell interactions.
January 2025 in “International Journal of Dermatology” Consider TFI in facial hypopigmentation diagnoses and confirm with a biopsy.
October 2025 in “EMJ Dermatology” Histopathology is crucial for accurately diagnosing eruptive vellus hair cysts.
12 citations
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June 2006 in “Anais Brasileiros de Dermatologia” The study found average numbers for different types of hair follicles in the scalp and observed differences between men and women, suggesting reasons for more common hair shedding in women.