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This study indicates that nail-matrical fibroblasts can induce hard keratin expression in non-nail-matrical keratinocytes, suggesting potential for using non-nail-matrical epidermal grafts to treat nail injuries.

In this study, three patients with alopecia areata exhibited spotty absence of the whiteness of their nail lunulae, potentially due to defects in the matrical epithelium.

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 revealed that during fetal development, MITF and Mart-1 expressing melanocytes progress from the dermis to the epidermis and hair follicles, with MITF possibly marking follicular stem cells.

This study found that Wnt signaling in the hair follicle is crucial for coordinating the behavior of epithelial and melanocyte stem cells, which drives hair regeneration and melanocyte differentiation in mice.

TR3 is mainly found in hair follicle stem cells and may be involved in hair loss.

This case study found that a skin lesion in a Samoyed dog did not match any single known follicular cyst or neoplasm type described in the literature.

This article explores questions about dormant hematopoietic stem cells and suggests avenues for future research, but does not present new experimental results.

This study found that Sox9 was variably expressed in most canine skin neoplasms, particularly in those originating from the hair follicle's bulge region, suggesting its potential as a stem cell marker.

This review summarizes the cell type distribution and functional significance of human keratins, emphasizing their roles in tumor diagnosis and potential clinical applications, and reports no new clinical findings.

This study found that beard hair medulla cells express an unexpected range of keratins, showing variability and promiscuous behavior in keratin interactions distinct from other hair follicle cells.

This report describes an unusual case of proliferating trichilemmal cyst with trichoepitheliomatous change in a young woman, differing from its typical presentation in elderly women.

This study found that dermal papilla and sheath cells can induce hair follicle formation in vitro and in vivo by interacting with hair follicle epithelial cells.

This case report describes a rare instance of melanocytic matricoma, a benign pigmented papule found in sun-damaged skin of an elderly individual, highlighting its distinct clinical and pathological features.

This study reports various immunophenotypical patterns in apocrine mixed skin tumors, resembling the structures of hair follicles, sebaceous glands, and apocrine glands.

This review discusses the molecular and functional aspects of the nude gene in skin biology, providing insights into its role and evolutionary development, but reports no new results.

This study found that GLI1 RNA CISH was highly sensitive and specific for distinguishing basal cell carcinoma from nonfollicular epithelial neoplasms but not from most benign follicular tumors.

This study demonstrated that multipotent stem cells in adult mice whisker follicles migrate to produce whisker growth, and that this process requires precise control of stem cell trafficking.

This article describes a case of pilomatricoma in a 22-year-old male with successful surgical excision and no recurrence, highlighting its histopathological features and typical clinical presentation.

This review discusses histologic findings in alopecia and emphasizes the importance of understanding normal follicular anatomy and cycles in transverse sections, without reporting new results.

This review outlines the clinical and histopathological features that aid in classifying tumors arising from the folliculosebaceous apparatus and reports no new research results.

This research found that Foxc1 transcription factor and COL17A1 are critical in regulating quiescence and hair thinning in hair follicle stem cells, with aging-related DNA damage leading to hair loss.

This article explains the structure and multifunctional roles of the human skin, including its protective, regulatory, and sensory functions, but does not report new research findings.

This study found that the protein CCN2 in dermal papilla cells is a physiologically relevant suppressor of hair follicle formation by destabilizing β-catenin, which may help maintain stem cell quiescence.

This report highlights the usefulness of specific diagnostic procedures, including penile/preputial cytology and transabdominal ultrasonography, in diagnosing cryptorchidism and Sertoli cell tumors in dogs with generalized skin conditions.

This study observed that pigmented casts are present in various alopecia types but are not specific to any single diagnosis, with distinct morphological features noted in trichotillomania.

This review outlines the classification, histopathologic presentation, and pathogenetic concepts of scarring and nonscarring alopecias, reporting no new clinical results and emphasizing the need for clinicopathologic correlation.

Long-standing benign tumors can become cancerous, especially in people with weakened immune systems.

The document explains how hair follicles develop, their structure, and how they grow.