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This study found that the creation of hair follicle lumens in mice is driven by the outward migration of keratin 79-positive cells, suggesting a novel mechanism for generating hollow cores in hair follicles.

This review explores the infundibulum's role and importance in skin diseases and emphasizes the need for further research into its biology and potential therapeutic targeting, but it presents no new findings.

This study suggests that pilomatricoma can differentiate towards various hair follicle structures, including hair matrix, hair cortex, follicular infundibulum, outer root sheath, and hair bulge.

This article presents a case of spontaneous, recurrent necrotizing infundibular crystalline folliculitis in the inguinal region and suggests unknown etiology possibly linked to microbiome and sebaceous gland dysfunction.

This study found that K79+ keratinocytes migrate outward to help form the hair follicle lumen both during development and adult regeneration, revealing a novel mechanism of hair follicle formation in mice.

Keratin 79 cells help form and regenerate hair canals.

This case report describes a 22-year-old woman with a nevoid plaque termed localized follicular hamartoma, characterized by skin-colored papules and specific cellular and structural features.

This study concludes that tiny infundibular cysts, rather than comedones, are the primary lesions in chloracne.

This paper reviews hidradenitis suppurativa, comparing its clinical and histopathological characteristics to acne, questioning the proposed link to terminal hair follicles, and reports no new results.

This case report describes a hybrid cyst in a Sprague-Dawley rat, showing both infundibular and matrical differentiation similar to different parts of normal hair follicles.

The document outlines criteria to identify and differentiate neoplasms based on follicular characteristics.

This study describes a system for generating hair follicles from dissociated cells in mice, suggesting that successful development requires a foundational epithelial platform.

This letter argues that cicatricial pattern hair loss likely represents end-stage androgenetic alopecia and not a variant of lichen planopilaris, as previously suggested.

This study used single-cell transcriptomic analysis to identify a specific cell population in acne patients' non-lesional skin, providing evidence for the comedone switch hypothesis by suggesting a shift towards infundibular differentiation at the expense of sebaceous gland maintenance.

In this study, Dsc 1 was highly expressed in certain layers of fetal epidermis and hair follicle but not in basal cells or oral mucosa, indicating its potential role in maintaining epithelial integrity.

This case report describes a solitary nasal fibrofolliculoma in a 60-year-old male and reviews existing literature, indicating its rare occurrence and potential link with Birt-Hogg-Dube syndrome.

This study found no significant difference in androgen receptor expression between lesional and non-lesional scalp in patients with androgenetic alopecia.

This study found that C8/144B antibody exclusively binds to the hair follicle bulge and not the epidermal stratum basale, with cytokeratin 19 serving as a key marker of certain basal keratinocytes that decrease with age.

This study reports that the monoclonal antibody BKN-1 specifically stained basal cell epithelioma cells and certain normal skin structures, indicating a similarity in keratin expression between the tumor and follicular epithelium below the isthmus portion.

This classification proposal introduces a novel system for categorizing cutaneous adnexal cysts based on their origin in the folliculosebaceous unit and sweat glands, aiming to simplify and enhance understanding of these skin lesions.

This study found that acne inversa is primarily an epithelial-driven disease, with cyst-forming tendrils causing inflammation due to rupture and the release of debris, highlighting limitations of punch biopsies for analysis.

This study found HLA and beta 2-microglobulin antigens in various skin structures, with specific localization patterns in keratinocytes and hair follicle components, but not in eccrine or apocrine glands.

This case study and literature review describe eruptive vellus hair cysts as uncommon, potentially inherited or acquired lesions, associated with other skin conditions, and challenging to treat despite being benign.

In this study, researchers identified similar presence of various nicotinic and muscarinic AChRs in lesional and normal epidermis, suggesting that tobacco-delivered nicotine may exacerbate acne inversa by interacting with endogenously produced acetylcholine.

In this case report, a 22-year-old female was diagnosed with follicular Dowling-Degos disease based on clinical and histological findings, with symptoms including skin lesions confined to hair follicles. The report emphasizes the importance of differentiating this rare variant from similar conditions for proper management.

This study reveals that hair follicles in mice and humans recruit epidermal Langerhans cells during skin inflammation via specific chemokine signaling pathways.

This study found that procyanidin oligomers, particularly dimers and trimers, significantly promoted hair growth in mice and hair epithelial cell cultures, suggesting potential use as hair growth agents.

This study found that activating CB1 receptor signaling in human hair follicles increased stem cell proliferation while reducing differentiated cell survival, suggesting CB1's role as a survival stimulus for epithelial stem cells.

This review discusses the evolving understanding of epithelial stem cells, noting how new models challenge old assumptions and suggesting multiple stem cell populations contribute differently to skin and hair follicle regeneration.

This study found that Gsdma3 mutations in mice led to thicker skin and longer hair infundibula, possibly by negatively regulating β-catenin expression in the epidermis.