File:The ready reference handbook of diseases of the skin (1901) (14578370499).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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n them ; and the peculiarodor, being so well marked. Ringworm has none of thesefeatures. Moreover, it occurs in the form of circular, cir-cumscribed, only partially bald patches covered with gray-ish scales in moderate amount; has characteristic nibbled-off stumps of hair ; and under the microscope we findthe spores less abundant, smaller, and more uniformlyround than in favus. It must be confessed, however, thatwithout the clinical features of one or the other disease,none but a most expert microscopist could make the diag-nosis in a doubtful case by the microscope alone. Ineczema baldness is very rare, and we will usually find acharacteristic patch of the disease behind the ear; its FA VUS. 273 crusts are greenish and tenacious, not gray and friable;the hair is matted by the sticky exudation; and if dis-crete impetigo lesions are present, they will contain pus,and not be solid like the favus crust. Leaving the scalpalone for a time will decide the matter, as scutula will be Fig. 31.
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Achorion Schoenleinii in hair shaft and follicle. (After Kaposi.) sure to form if the disease is favus. Seborrhea causes ageneral thinning of the hair, the scalp is not atrophic,there are no scutula, and no achorion in the hair and scalp.Lupus erythematosus resembles favus only in producingatrophic red spots. There will usually be patches of the 274 DISEASES OF THE SKIN. disease elsewhere, and its whole course is different. Pso-riasis does not cause atrophic bald spots, and rarely occurson the scalp alone. Alopecia areata presents more or lesscircular bald areas, but these are white, smooth, and ofnormal texture, and there is no fungous growth in thehair. Alopecia from syphilis in its secondary stage re-sembles favus more closely than any other disease of thescalp; but it occurs primarily at a later age than doesfavus, it comes on more suddenly, there is no history ofcrusts, nor cicatricial alteration of the scalp, and there willbe other evidences of syphilis on the body, and (especia

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