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In this case study, electron microscopy revealed that harlequin ichthyosis involves giant mitochondria in keratinocytes and abnormal lamellar granule development, which may contribute to pathogenesis through altered lipid metabolism.

This study found that the twisted hair shafts characteristic of pili torti may result from uneven outer root sheath cell development, leading to irregular hair shaft modeling and twisting.

This study highlights the loss of hair-type keratin genes in cetaceans compared to terrestrial mammals, suggesting a potential adaptive role linked to their hairless phenotype and habitat changes.

This study found that yellow dots seen under dermatoscopy are a sensitive and specific indicator of treatment response in alopecia areata, showing significant reduction as early as four weeks.

In this study, reduced hair density, diameter, and follicle miniaturization were key characteristics of female pattern hair loss in Southern Chinese women, with occipital and temporal sites also affected.

This commentary reviews the evidence for microinflammation's role in pattern hair loss and suggests that further studies with age- and sex-matched controls are needed to substantiate the findings.

This exchange discusses interpretations of syphilitic chancres, noting disagreement over whether multiple lesions are atypical given historical references that describe primary chancres as often being single.

This review discusses the developmental plasticity between teeth and taste buds in cichlid fishes and reports no new experimental findings, highlighting potential implications for craniofacial organ patterning and regeneration.

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 study found evidence that polythelia pilosa, previously excluded from classification, should be reintroduced as it marks true aberrant mammary structures in men and hirsute women.

This case report identifies a new type of hair matrix tumor called "rippled pattern trichomatricoma," distinguished by its unique cell arrangement and differentiation features.

This case report describes a 56-year-old woman whose nonscarring alopecia, consistent with alopecia areata with follicular mucinosis, resolved completely after treatment with oral prednisone.

This study describes a new mite species from marmots in a city park in Washington, noting that infested marmots displayed significant hair loss and tissue abnormalities.

This study reported that 19 out of 29 examined individuals from a family spanning seven generations exhibited the distinctive symptoms of hypotrichosis congenita hereditaria Marie Unna type.

This study found that in mink, the pituitary gland is essential for normal seasonal pelage cycles, and manipulating hormone levels can affect hair growth and type.

This study observed that both excessive and deficient selenium levels in a C57BL/6 mouse model were associated with hair loss and changes in hair follicles, likely due to alterations in the hair follicle cycle and increased apoptosis.

This article discusses a hypothesis on the development and evolution of scales, hairs, and feathers from fish to amniotes, based on regions of dermo-epidermal interactions in skin, but reports no new findings.

This study reported that immunotherapy in cancer patients can lead to skin-related immune adverse events, such as rashes, pruritus, and vitiligo, affecting a substantial proportion of patients.

This study observed that aged dogs exhibit atrophy of the epidermis, appendages, and dermis, along with variable skin changes and increased dermal pigmentation, but lack senile elastosis seen in humans.

This abstract presents supplementary trichoscopy images for alopecia areata and scarring alopecia but reports no clinical findings.

Hair changes may indicate disease activity in pemphigus patients.

A 12-year-old with ichthyosis linearis circumflexa showed significant improvement after 30 sessions of narrowband UVB phototherapy, as reported in this case study.

In this study, researchers found that stress likely triggers symmetrical alopecia in Formosan macaques in Mt. Longevity, Taiwan, with higher stress hormone levels associated with the condition.

In this study, researchers identified loss of function variants in the HR gene as likely causes of the distinct roaning hair coat seen in lykoi cats.

Finasteride negatively affects fish reproduction and gonadal development.

This study observed that Yuyi hairless mice develop alopecia shortly after birth, with the skin eventually thickening and forming folds, and hair failing to regrow as they age.

This study found that both rats and mice on iron-deficient diets developed symmetrical hair loss within two months.

In this study, researchers found that adults with alopecia areata exhibited trichoscopic features of empty follicular openings and tulip hair, while children showed more honeycomb pigment patterns and pohlpinkus constriction on their scalp lesions.