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This case study describes a young girl with sparse, brittle scalp hair and multiple keratotic papules, but no systemic or familial abnormalities were found.

This study investigated the histopathology of ectodermal dysplasia/skin fragility syndrome, identifying specific skin and hair abnormalities associated with PKP1 gene mutations in two young female patients.

This report describes a rare case of a three-day-old male with ichthyosis hystrix type of epidermal nevus, featuring specific skin and hair symptoms but no nail or skeletal abnormalities.

This case series highlighted three pediatric patients with congenital nail anomalies, revealing underlying developmental or genetic issues such as symbrachydactyly and potential Adams–Oliver syndrome, underscoring the critical role of dermatologists in early detection and diagnosis of these conditions.

This study found that heterozygous mice overexpressing Claudin-6 experienced alterations in epidermal and hair follicle differentiation, leading to distinctive coat characteristics and a disrupted epidermal permeability barrier.

In this study, hair shafts from trichothiodystrophy patients with ERCC2 mutations revealed abnormal cuticle structures and protein imbalances compared to normal hair shafts.

Hair malformations may occur due to timing issues in hair development.

This study describes a rare form of congenital alopecia in domestic short hair cats, characterized by hair shaft defects and follicular dystrophy similar to those seen in certain mutant mouse strains.

This case report presents a patient with woolly hair and associated symptoms, including keratosis pilaris, nail dystrophy, increased interdental spaces, and recurrent bullous impetigo, observing a combination not previously reported.

A 4-year-old girl had a rare hair disorder affecting only part of her scalp.

This chapter reviews various fungal skin diseases affecting cattle but does not report new research findings; it focuses on rare, inherited, and congenital conditions like follicular dysplasia and cutaneous asthenia.

This case report describes a 3-year-old male with X-linked ichthyosis and associated neurologic abnormalities, identifying an unusual cortical development malformation and suggesting that abnormal hair banding may assist diagnosis.

This study reports the first keratin gene mutation affecting the tail domain, leading to a unique cytoskeletal abnormality and severe epidermal hyperkeratosis, highlighting the tail domain's critical role in keratin organization.

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

This case report details a 2-year-old girl who developed hypertrichosis on areas of her skin affected by multiple insect bites and subsequent scratching, resulting in unusual hair growth.

Three related Persian cats have a rare, likely hereditary skin condition causing hair loss and poor coat quality, with limited treatment options.

This study observed defects in hair cuticle cross-linking in some, but not all, mouse mutants with sparse or structurally unsound hair.

This study found that desmocollin 1 is crucial for strong adhesion and barrier maintenance in the mouse epidermis, with its absence leading to skin and hair issues resembling chronic dermatitis.

This case report describes a unilateral contact dermatitis caused by shoe dye containing 4-aminoazobenzene, which was confirmed with patch testing, highlighting its atypical presentation.

This study observed that the catagen phase in hairless mice displayed a slower shortening of the mutant epithelial column, resulting in longer total follicle length and abnormalities in the connective tissue sheath and glassy membrane.

This study examined patients with trichostasis spinulosa and identified distinct differences in the distribution and microscopic appearances of lesions compared to keratosis pilaris and eruptive vellus hair cysts.

This study identified histologic lesions and a defect in adhesion molecules causing hair loss in mice with the bal mutation, linked to a mutation in the desmoglein 3 gene.

This study found that the HoxC gene cluster is crucial for the development of hair and nails in mice, with key regulation by two mammalian-specific enhancers.

Hair shaft changes may be linked to CCCA, but their role is unclear.

This study found that the absence of sebaceous glands may be an early factor in the development of keratosis pilaris, leading to hair shaft and skin barrier abnormalities, independent of filaggrin mutations.

This study found that nail abnormalities, particularly longitudinal ridging, were more frequent in vitiligo patients (78%) compared to healthy controls (55%).

This study compared trichostasis spinulosa with keratosis pilaris and eruptive vellus hair cysts, finding differences in lesion distribution and microscopic appearance.

This chapter provides an overview of 11 common hair and nail conditions in children with brown skin, utilizing clinical photographs and a question-and-answer format to discuss conditions such as alopecia areata, telogen effluvium, and nail lichen planus.

This report reviews familial cases of aplasia cutis of the scalp, noting large irregular defects at the vertex or anterior along the sagittal suture in six families.