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Jadassohn–Pellizzari Anetoderma
Anetoderma is a benign but uncommon disorder that causes localized areas of flaccid or herniated sac-like skin due to a focal reduction of dermal Elastic fiber, elastic tissue. Anetoderma is subclassified as primary anetoderma, secondary anetoderma, Iatrogenesis, iatrogenic anetoderma of prematurity, congenital anetoderma, familial anetoderma, and drug-induced anetoderma. Two forms of primary anetoderma have been identified, based on whether an inflammatory response took place prior to the atrophy's appearance, anetoderma of Jadassohn-Pellizzari, in which inflammation occurs before the atrophic lesions appear, and anetoderma of Schweninger-Buzzi, in which inflammation is not present. Signs and symptoms Typically pink macules that are round or oval and have a diameter of 0.5 to 1 centimeters grow on the trunk, thighs, and upper arms. They are less frequently found on the neck, face, and other areas. Usually, the soles, palms, and scalp are unaffected. Every macule grows for one or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elastic Fiber
Elastic fibers (or yellow fibers) are an essential component of the extracellular matrix composed of bundles of proteins (elastin) which are produced by a number of different cell types including fibroblasts, endothelial, smooth muscle, and airway epithelial cells. These fibers are able to stretch many times their length, and snap back to their original length when relaxed without loss of energy. Elastic fibers include elastin, elaunin and oxytalan. Elastic fibers are formed via elastogenesis, a highly complex process involving several key proteins including fibulin-4, fibulin-5, latent transforming growth factor β binding protein 4, and microfibril associated protein 4. In this process tropoelastin, the soluble monomeric precursor to elastic fibers is produced by elastogenic cells and chaperoned to the cell surface. Following excretion from the cell, tropoelastin self associates into ~200 nm particles by coacervation, an entropically driven process involving interact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
