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This case study reports a peculiar variant of an epidermal cyst in a patient, featuring unique characteristics like brownish, lumpy contents resembling bone marrow.

Keratins change and are modified differently in skin layers and body parts.

This study describes trichilemmal keratinization as a distinct process of hair follicle keratinization that occurs in specific areas of the outer root sheath, illustrated using electron microscopy on dog hair.

This study suggests that keratin expression in keratoacanthomas resembles that in the upper part of hair follicles, implying a potential origin, but it is indistinguishable from squamous cell carcinomas in terms of keratin reactivity.

This study suggests that spiny keratoderma may be an ectopic hair formation on palms and soles, based on keratinization patterns observed using antikeratin antibodies and electron microscopy.

This review summarizes recent advances in understanding intermediate filament structure and their implications for pathological mutations and human diseases, but it reports no new experimental results.

Keratin structure changes during keratinization, but the exact model remains uncertain.

This study provides evidence for K1 and K10 derivatives' presence in the inner root sheath and hair cuticle, suggesting that these hair follicle parts may follow familiar keratinization principles.

This study found that keratin expression patterns vary within nail unit structures, with the nail matrix uniquely expressing the acidic hair-type keratin Ha1.

Mouse tail skin has different keratinization near hair follicles and scales.

This study demonstrates that overexpression of K16 in transgenic mice disrupts normal keratinization, leading to hyperkeratosis, acanthosis, and alterations in the skin's epithelial cells.

Hair follicles form hard α-keratin filaments in four steps, showing structural differences.

In this study, researchers identified the ventral matrix as the primary source of nail plate formation, while the dorsal portion is generated by the apical matrix.

This study identified a new 65 kD and 48 kD keratin pair expressed in specific mouse epithelial sites, suggesting a unique evolutionary branch of hair-related keratins.

This review covers various disorders of cornification and their treatments, offering clinical insights but reporting no new research findings.

This case report describes two patients with a likely new type of pachyonychia, characterized by nail thickening and severe generalized hypotrichosis, possibly linked to a mutation in a hard keratin.

This study found that adding keratin to a collagen hydrogel improved keratinocyte differentiation compared to a pure collagen hydrogel, particularly when calcium was also present in the media.

This study observed that hair follicle cuticular cells undergoing keratinization were significantly thicker than those in a normal hair shaft, due to incomplete loss of cytosol.

This study reviews the complex keratinization process in the epidermis, detailing how various factors regulate keratinocyte differentiation and emphasizing the importance of understanding this process for the pathogenesis of skin disorders like ichthyoses and psoriasis.

Vertebrate skin evolved to be more specialized and complex, especially in land animals.

This review discusses changes in keratin structure or gene expression that result in various skin disorders and reports no new clinical findings.

This study describes a distinctive form of ichthyosis characterized by abnormal epidermal differentiation mainly within hair follicles in four patients with congenital follicular hyperkeratosis.

This research provides insights into how keratin hydrogels, modified to control disulfide crosslinking, may function as a treatment platform for bone injuries.