. A practical treatise on diseases of the skin, for the use of students and practitioners. A callosity is a whitish-gray, yellowish-gray, or brownish, semi-transparent, local-ized and circumscribed horny thickening of the epidermis of the skin, due tohypertrophy of the stratum corneum, most commonly occurring upon the handsand feet. Callositas is here employed to designate strictly acquired horny thick-ening of the epidermis. Under the title Keratosis are described a series of con-genital and other symmetrical thickenings of both palms and soles, tylotic andichthyotic in type, often the result
. A practical treatise on diseases of the skin, for the use of students and practitioners. A callosity is a whitish-gray, yellowish-gray, or brownish, semi-transparent, local-ized and circumscribed horny thickening of the epidermis of the skin, due tohypertrophy of the stratum corneum, most commonly occurring upon the handsand feet. Callositas is here employed to designate strictly acquired horny thick-ening of the epidermis. Under the title Keratosis are described a series of con-genital and other symmetrical thickenings of both palms and soles, tylotic andichthyotic in type, often the result of morbid conditions in the nervous centresand entirely unconnected originally with pressure- and contact-effects. Callosities are superficial, circumscribed, dirty-white, yellowish-whiteor darker, flattened, thickened, and horny patches of epidermis, densein structure and usually insensitive. Section of a single plaque showsit to be largest at the centre and least at the periphery. Callosities varyin size from that of a finger-nail to that of a section of a hens egg, being PLATE III,.
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Keywords: ., bookauthorhydejamesnevins184019, bookcentury1800, bookdecade1890
