File:The ready reference handbook of diseases of the skin (1901) (14578565857).jpg

Identifier: readyreferenceha00jack (find matches)
Title: The ready reference handbook of diseases of the skin
Year: 1901 (1900s)
Authors: Jackson, George Thomas, 1852- (from old catalog)
Subjects: Skin
Publisher: New York and Philadelphia, Lea brothers & co.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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that they can be nearly allscratched away. AVhile psoriasis may occur anywhere on the body, and,as we have seen, may become universal, its most frequentlocations are the extensor surfaces of .the limbs, elbows, andknees, or rather the face of the tibia? just below the knee,and the scalp. It may occur upon the first two locationsalone. When it occurs on the scalp careful examinationwill generally show some lesion elsewhere on the body, andwe will usually find a little patch in front of the ears, andvery often there will be a red scaly line on the foreheadjust in front of the hair-line, a feature that is as strikingand as characteristic of psoriasis as the corona veneris is 456 DISEASES OF THE SKIX. of syphilis. The hair does not fall, as a rule. In somecases, however, we may have transient or permanentalopecia. The whole scalp may be covered with a con-tinuous patch, or distinct scaly patches may form as on thebody. In any event the border of the patch will besharply defined. Fig. GO.
Text Appearing After Image:
Psoriasis. (From Prof. G. H. Foxs service in the Vanderbilt Clinic.) The palms and soles arc very rarely the seat of the dis-ease, and then only ns part of general psoriasis. It istrue that a few eases have been reported in which it liasbeen said even to be located upon one hand alone, and thisby competent observers; but the probabilities are all infavor of such cases having been either syphilis, which PSORIASIS. 457 is most likely, or squamous eczema. The disease isbilateral, and sometimes may show a decided tendency tosymmetry. In old, inveterate cases there may be considerable thick-ening of the skin, a feature that is usually wanting, andfissures may form about the joints that may be painful andbleed. This may also occur on the scrotum, or on the trunkwhere the skin is in folds. The nails are affected in some cases, becoming opaque,lusterless, furrowed transversely, discolored, and some-times cracked; while they are raised from their beds bythe accumulation of scales underneath th

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