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This report describes a case where dermoscopy of shed hair helped diagnose post-COVID acute telogen effluvium by revealing depigmented club-shaped bulbs, highlighting its potential as a noninvasive diagnostic tool.

This study found that transgenic mice expressing HPV E6/E7 in the outer root sheath experience continuous hair follicle cycling due to delayed catagen entrance and insensitivity to telogen resting signals.

This study used electron microscopy to characterize tissues on telogen hair roots, finding that tissue quality, including nucleated and nonnucleated epithelial cells, may play a crucial role in DNA typing for forensic analysis.

This study developed a new STR typing strategy for forensic casework, enabling the simultaneous analysis of 11 polymorphic systems, particularly useful for limited or degraded DNA samples such as telogen hair roots.

This review discusses different types of telogen effluvium, highlighting that most cases seen by dermatologists are autoimmune-related, with stress as a triggering factor, and reports no new clinical findings.

This study found a significant shift to the telogen phase in the hair growth of children with classical marasmus compared to normal children, suggesting a connection to the chronicity of the condition.

Overexpression of certain genes can shorten hair by disrupting the hair-growth cycle.

This study found that mu-crystallin gene expression in mouse skin is highest during the anagen phase of hair development, suggesting its possible role in hair follicle growth.

The study suggests that nestin-expressing progenitor cells can differentiate into outer root sheath keratinocytes in hair follicles, indicating distinct progenitors for different hair follicle and epidermal components.

This study found that in human hair bulbs, telomerase is present mainly in the nuclei of cells undergoing proliferation, particularly in the matrix epithelium during the anagen phase, and sparsely in the outer root sheath during late catagen and telogen phases.

In this study, researchers linked SARS-CoV-2 infection to telogen effluvium in some COVID-19 patients by observing the accumulation of viral proteins in hair follicle cells, which may trigger stress responses and cell death, suggesting hair follicles as a potential target in COVID-19.

This study found that in female patients with telogen effluvium, club hair in the isthmus region was longer than in those with alopecia areata, offering insights into hair morphology differences.

This study found that applying a surfactant solution with 2.5% selenium disulfide to the back of guinea pigs significantly increased telogen hair, which may relate to observations of diffuse hair loss in humans under intense exposure conditions.

In this study, the growth-inhibiting potential of calcipotriol did not affect the telogen/anagen hair ratio during treatment for scalp psoriasis.

This manuscript reviews the multifaceted causes of female hair loss, including hormonal imbalances and nutrient deficiencies, and suggests that non-pharmaceutical options like saw palmetto and curcumin show promise in enhancing hair density, though further studies are needed to confirm their effectiveness and safety.

This study suggests that diffuse alopecia areata initially involves an intense inflammatory attack during the anagen phase, progressing through different hair cycle stages with specific shedding patterns.

In this study, researchers applied Yashtimadhwadi tail using shirodhara and Nasya karma treatments on sixty patients experiencing hair fall, finding that both methods produced excellent results in reducing symptoms such as hair fall, roughness, and dandruff.

This study found that psoriasis patients with scalp involvement had a significantly lower anagen ratio and higher telogen ratio compared to healthy individuals, indicating an association with an increased telogen/anagen ratio.

MPZL3 protein affects hair growth cycles and could help manage hair loss.

Scalp hair grows at 0.37 mm/day, forearm hair at 0.18 mm/day, and thigh hair at 0.30 mm/day, with no significant differences found in people with certain hair conditions.

This article discusses alopecia areata incognito, highlighting its diffuse hair loss pattern and favorable response to steroid treatment, but it reports no new clinical data.

This manuscript describes a proposed ‘trichoscopy-assisted hair pull test’ that enhances the diagnosis of hair loss conditions by allowing immediate examination of proximal hair shafts and roots in patients with a positive hair pull test.

Human hair growth involves active, resting, and intermediate phases, and examining plucked hairs can teach students about hair biology and diseases.

Naproxen is not the cause of hair loss in a child; it's due to a toxic event with expected hair regrowth.

This article reviews the stages and regulation of the hair cycle, highlighting molecular regulators involved, but it does not present new research findings.

This review summarizes the major events and regulators of the hair cycle in mammals but reports no new experimental results; it emphasizes the complex regulation of stem cell activation and differentiation during hair growth.

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.

This study found that aged tritiated thymidine breaks down and incorporates into cytoplasmic macromolecules, not DNA, suggesting caution in its use.

This article reviews the historical development of understanding the hair growth cycle, particularly anagen, catagen, and telogen phases, and reports no new clinical findings.

In this study, researchers developed a non-invasive method to distinguish exogen hair from telogen hair on the human scalp, finding that normal exogen hair levels are generally less than seven hairs per cm².