Keratin 9 (K9) is a type I intermediate filament protein whose expression is confined to the suprabasal layers of the palmoplantar epidermis. Although mutations in the K9 gene are known to cause epidermolytic palmoplantar keratoderma, a rare dominant-negative skin disorder, its functional significance is poorly understood. To gain insight into the physical requirement and importance of K9, we g...

Gap junctions, which mediate rapid intercellular communication, consist of connexins, small transmembrane proteins that belong to a large family of proteins found throughout the species. Mutations in the GJB2 gene, encoding Connexin 26, can cause nonsyndromic autosomal recessive or dominant hearing loss with or without skin manifestations. A 3-yr-old Korean female and her mother presented to ou...

A 5-year-old caucasian boy, born of non-consanguineous parents, was referred to the dermatology department due palmar hiperlinearity and multiple 2-3 mm hyperkeratotic circular lesions in soles (Fig. 1). The remaining physical examination unremarkable. There a family history palmoplantar hyperkeratosis mother maternal grandfather. To spare child, punch skin biopsy taken from his mother. Patholo...

Circumscribed palmoplantar hypokeratosis (CPH) is a rare acquired dermatosis first described in 2002. It affects mostly the thenar or hypothenar eminences of palm middle-aged elderly women and manifests clinically with sharply limited, annular erythematous plaques depressed surface, rimmed by slightly raised, keratotic border. Microscopically, circumscribed shows sharp decrease horny layer thic...

BACKGROUND Palmoplantar psoriasis is a difficult to treat variant of plaque psoriasis. OBJECTIVE To study the safety and efficacy of infliximab in non-pustular palmoplantar psoriasis. METHODS Patients with non-pustular palmoplantar psoriasis affecting at least 10% of their palms and soles and with a modified palmoplantar psoriasis area and severity index (m-PPPASI) of at least eight were re...

The palmoplantar keratodermas are a heterogenous group of hereditary disorders of keratinization. They are characterized by epidermal thickening and a yellow waxy appearance of the palms and soles. Genetic studies have linked various forms of palmoplantar keratoderma to markers on chromosomes one, twelve, and seventeen, and several genes have been identified. Primary lymphedema is occasionally ...

Although palmoplantar psoriasis can be severely disabling, there are very few large clinico-epidemiological studies on this condition. Our purpose was to study the morphology and pattern of lesions in Indian patients with palmoplantar psoriasis and to elucidate the role of occupation in the incidence/localization of these lesions. All patients attending our Psoriasis Clinic from 1993 to 2000 we...

Background. Warts are cutaneous and, sometimes, mucosal lesions caused by one of the several human papilloma viruses. Aim. Assessment of the clinicoepidemiological aspects of warts. Materials and Methods. One hundred consecutive patients of warts presenting to the department of our institution were assigned two broad locational groups: genital and nongenital warts, the latter subdivided into co...

Sir, Palmoplantar keratodermas (PPKs) constitute a heterogeneous group of skin disorders with the distinctive trait of hyperkeratosis of palmoplantar skin. The disorders are classified clinically by the morphology and distribution of the hyperkeratosis, the presence of associated cutaneous and non-cutaneous features and by the mode of transmission (1, 2). Familial diffuse epidermolytic PPK (EPP...