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The document explains what healthy skin, nails, and hair look like on an ultrasound.

This paper reviews the complex histology of skin layers and underscores its importance for accurate and reproducible diagnosis in cutaneous pathology, but reports no new research findings.

This study found that type III collagen was significantly more abundant in the recovering traumatic skin of guinea pigs compared to normal skin, indicating it may play a role in tissue repair.

This study found that the Verhoeff-Van Gieson stain effectively distinguishes scarred from non-scarred dermis and aids in classifying types of permanent alopecia based on elastic tissue patterns.

This chapter reviews skin components, wound healing mechanisms, and the potential of biomaterials to enhance skin repair and regeneration, without offering new experimental results.

In this study, researchers successfully constructed a high-precision three-dimensional model of human skin dermis, revealing a detailed analysis of dermal porosity and pore diameter distribution, which can aid the development of biomimetic tissue-engineered skin.

This review examined and discussed the role of dermis-derived factors in the regulation of melanogenesis, noting their significance in both normal and abnormal mammalian skin conditions, suggesting an underexplored area of study compared to dermal and epidermal influences.

This study found that adipokines were expressed in the epidermis, hair follicles, sebocytes, apocrine glands, and vascular endothelium of normal canine skin, but not in the dermis or hypodermis.

This study found that photoepilation in mice may disrupt normal dermal wound healing and increase the risk of hypertrophic scars or keloids.

This study observed that human growth hormone treatment in osteoporosis patients appeared to improve skin thickness and restore dermal structures towards normal without stimulating hair, sebum, or melanin.

This study showed that ultrapulse carbon dioxide laser ablation can precisely remove rabbit skin without scarring, facilitating normal skin and hair restoration within one month.

This study found that proper levels of retinoic acid, controlled by the enzyme Cyp26b1, are essential for normal hair follicle development and morphogenesis in mice.

This study found that in alopecia areata, hair bulbs are blocked in an early growth stage due to impaired metabolic function in the surrounding connective tissue, hindering hair growth.

In this study, chronic zinc chloride administration in mice led to the replacement of long coarse hairs with short fine hairs, while overall skin histology remained normal.

This study explored the role of Twist2 in fetal wound healing in embryonic mice, observing that its expression was vital for scarless regeneration and normal hair follicle formation; Twist2 knockdown led to visible scars and defective follicle formation.

This study applied a new RGB trichrome stain to human skin samples, revealing distinct structural staining in normal tissues and potential proteoglycan-rich zones in hair follicles.

This review discusses dermal cell heterogeneity in wound healing and scar formation, highlighting the varied roles of different fibroblasts and the potential of skin substitutes without presenting new clinical results.

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 article reviews the anatomy and pathology of skin and hair to aid in diagnosing skin diseases and discusses potential therapies, without reporting new clinical results.

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 reported significant upregulation and release of S100A4 in psoriatic skin, which may actively contribute to psoriasis pathogenesis.

This study reports that flaky skin mice exhibit skin and nail features that closely resemble human psoriasis vulgaris, suggesting they may serve as a natural model for this condition.

This study observed that overexpression of the enzyme ODC in transgenic mice caused hair loss and skin changes similar to human papular atrichia, suggesting that ODC might be involved in a critical hair follicle function pathway.

The study found that balding scalps have more thin hairs and larger oil glands, which might contribute to skin conditions related to hair loss.

In this study, aged mice showed better regenerative skin outcomes than young mice, linked to a specific fibroblast subpopulation and enhanced signaling interactions that promote regeneration. EREG treatment improved young mice's skin regeneration, suggesting potential for scarless therapies.

This study suggests that pseudopelade may be an autonomous disease based on its distinctive clinical and histopathological features not present in other scarring alopecias.

In this case report, an 11-year-old girl was diagnosed with lipedematous scalp, a condition typically observed in adult women, based on clinical features and histopathological findings.

This study found that residual sweat glands in hypertrophic scar tissues may regenerate from adult epidermal stem cells or residual glands after burn injury.

In this study, the researchers observed that male pattern alopecia is characterized by miniature follicles, enlarged sebaceous glands, and an increased number of mast cells, without significant abnormalities in enzyme activity.

Human hair follicles can be used to create skin-like tissue for wound healing and drug testing.