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The document describes how to tell different types of non-scarring hair loss apart by looking at hair and scalp tissue under a microscope.

This review explores embryonic epidermal development and discusses key molecular regulators and roles of the sub-epidermal mesenchyme, but reports no new experimental results.

This study suggests that dermal adipocytes might play a key role in skin aging due to their transformation into fibrotic structures in chronically photo-damaged skin.

This study observed that in aged mouse skin, there was an increase in IL-17-expressing T helper cells, γδ T cells, and innate lymphoid cells, and blocking IL-17 signaling reduced skin inflammation and delayed age-related changes, suggesting it as a potential target to mitigate skin aging.

This study found that permanent alopecia can occur after certain chemotherapy treatments and presents as nonscarring hair loss similar to androgenetic alopecia, with specific histological features that could be misdiagnosed without proper clinicopathological correlation.

Drug addicts often have scars, skin color changes, blocked veins, and bruising, with severe ulcers from barbiturate injections.

In this study, mouse sweat gland development relied on a regulatory sequence initiated by Wnt/β-catenin signaling, and disruptions in Wnt, Eda, or Shh pathways led to distinct developmental failures.

This review describes techniques for successful skin grafting and variations of the procedure, reporting no new clinical results.

This study found that polymeric nanoparticles may effectively deliver finasteride topically to hair follicles, potentially improving alopecia treatment with fewer side effects than oral forms.

This article discusses the history and terminology of toxic epidermal necrolysis but reports no new clinical results.

This review discusses advances and challenges in skin tissue engineering, focusing on developing 3D constructs for functional skin substitutes, and reports no new clinical results.

This study found that the yellow dot pattern observed in dermoscopy of alopecia areata corresponds to inefficient follicular structures containing hair remnants, as corroborated by reflectance confocal microscopy and pathological findings.

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 found that in androgenic alopecia, the arrector pili muscle degenerates and is replaced by fat, unlike in normal skin or telogen effluvium.

This report describes two patients with frontal fibrosing alopecia who developed acute hair loss on their limbs, revealing that the limb alopecia had similar histological features to scalp alopecia.

This study investigated the histopathology of ectodermal dysplasia/skin fragility syndrome, identifying specific skin and hair abnormalities associated with PKP1 gene mutations in two young female patients.

This study found that follicular streamers are mostly present in non-scarring alopecia cases, and tracking their location can improve diagnosis accuracy.

This review examined dermatologic symptoms associated with COVID-19 in 2,560 patients, with chilblains/pernio-like lesions being the most common, suggesting these symptoms may aid in early identification of cases.

This article discusses the use of methotrexate for treating generalized pustular psoriasis in a 2-year-old child, providing a specific case study but reporting no new clinical results.

This study found evidence of increased DNA methylation of the androgen receptor gene in occipital hair follicles from men with androgenetic alopecia.

This review explores recent insights into how intrinsic gene oscillations and molecular interactions in hair follicle stem cells contribute to their regenerative potential, with potential implications for regenerative medicine, but reports no new clinical results.

This study identified a gene expression signature in mouse embryonic dermal fibroblasts that depends on Wnt/β-catenin activity, potentially influencing dermal fibroblast identity and function.

An 8-year-old girl with vitiligo developed extra hair growth on her knee after using tacrolimus ointment.

This article reviews drug-induced pigmentation and reports no new clinical findings, highlighting difficulty in confirming drug associations due to factors like delayed onset and polypharmacy.

This study reports that horizontal sections of scalp biopsies improve the diagnosis of alopecia areata, especially when characteristic inflammatory infiltrates are missing.

This study found that dissecting folliculitis is more common than previously thought in Taiwan, with obesity possibly linked to higher severity of this condition, but smoking not associated.

This study found that hydrophobic lipid-coated silica nanoparticles penetrated deeper into human stratum corneum compared to their hydrophilic counterparts, highlighting the influence of surface polarity on skin penetration.

This brief report describes a case of Fox-Fordyce disease in a prepubertal girl but reports no new clinical findings.

This review suggests the existence of a new syndrome characterized by keratosis pilaris, ulerythema ophryogenes, and monosomy 18p, emphasizing its potential utility in diagnosing monosomy 18p.

This study found that while the combination of oral propranolol and intradermal injections in guinea pigs led to psoriasiform changes, it did not fully mimic psoriasis.