. The ready-reference handbook of diseases of the skin. in amount. Ichthyosis simplex. This is a more severe grade of thedisease in which the skin is dry, harsh, and scaly, and alsodivided off into small diamond-shaped or polygonal figures(Fig. 33). While the whole cutaneous surface may beinvolved, the disease is usually most pronounced upon theextensor surfaces of the legs and arms. The face, scalp,palms, and soles are often spared. The skin about theextensor surfaces of the elbows and knees is generallythrown into well-marked folds, while the flexor surfaces ofthe same joints are unaffected,
. The ready-reference handbook of diseases of the skin. in amount. Ichthyosis simplex. This is a more severe grade of thedisease in which the skin is dry, harsh, and scaly, and alsodivided off into small diamond-shaped or polygonal figures(Fig. 33). While the whole cutaneous surface may beinvolved, the disease is usually most pronounced upon theextensor surfaces of the legs and arms. The face, scalp,palms, and soles are often spared. The skin about theextensor surfaces of the elbows and knees is generallythrown into well-marked folds, while the flexor surfaces ofthe same joints are unaffected, the skin in these situationsbeing soft and natural. While upon the extremities the ICHTHYOSIS. 283 disease is well developed, upon the trunk it may assumemore of the xerodermatous form. When the face and scalpare affected they are simply very scaly, while on the palmsand soles we have accentuation of the normal lines. In atypical case the skin, especially of the extremities, will begrayish, greenish, or blackish-green in color, dry, and the Fig. Ichthyosis. little polygonal plates will be attached in their centers andturned up slightly at their edges, so that they appear de-pressed in the centers. The amount of loose scaling issometimes abundant, but usually moderate in amount. Thehair, if the scalp is involved, is dry. The nails are oftenpitted. Ectropion may result in those rare cases in which 284 DISEASES OF THE SKIN. the disease affects the face severely. Itching is often com-plained of, and eczema may complicate matters. There isa marked absence of perspiration, and lessened sebaceoussecretion ; and the patients are sensitive to cold. The dis-ease is usually worse in cold weather. Ichthyosis hystrix is one of the rarest forms of the dis-ease. It is never general, but confined to a limited area,or to a number of areas. It is often unilateral, and attimes seems to follow the course of a nerve in its distribu-tion. It occurs in the form of horny papillary growths,that m
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectskin, bookyear1896
