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In a natural arrangement of affections of the skin, families should be bound together not alone by one tie, but by all possible ties, as etiology, pathology, clinical evidences and therapy. Is this the present mode? No. Consultany scheme which has ever been in vogue. One writer groups by clinical appearances—his papular affections, for example, embrace lichen planus, lichen urticatus, lichen pilaris and lichen tropicus; these four conditions have hardly anything in common, save the accident of papulation. Another writer selects the pathological process as a basis for grouping—his "exudative affections" embrace on the one hand herpes iris, and pemphigus, and on the other hand eczema. What have the first two in common with the third, other than the accident of a serous transudate? A third writer chooses anatomical seat—his"trichoses,"for example, include hirsuties and fragilitas crinium. Does a knowledge of one condition furnish any aid to the comprehension of the
PREBLE E. ON A NEW AND PRACTICAL MODE OF GROUPING AFFECTIONS OF THE SKIN, WITH AN ANALYSIS BASED UPON ONE THOUSAND CASES.Read before the Section of Dermatology and Syphilography, at the Forty-third Annual Meeting of the American Medical (Association, held at Detroit, Mich., June, 1892. JAMA. 1893;XX(18):493–496. doi:10.1001/jama.1893.02420450001001
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