. Diseases of children. MEDICAMENTOSA. This includes all eruptions caused by the administration of a rule, the skin lesions appear after some days or weeks of con-tinuous dosage; occasionally, however, they may develop after a verysmall amount of the medicine has been taken. Certain drugs, especially the bromides, belladonna, the iodides,quinin, salicylic acid, mercury, arsenic, and many coal-tar derivatives,are apt to produce cutaneous eruptions. Some of these, as the bro- 606 DISEASES OF THE SKIN mides, iodides, and belladonna, usually produce a rash, others lessregularly do so. Som
. Diseases of children. MEDICAMENTOSA. This includes all eruptions caused by the administration of a rule, the skin lesions appear after some days or weeks of con-tinuous dosage; occasionally, however, they may develop after a verysmall amount of the medicine has been taken. Certain drugs, especially the bromides, belladonna, the iodides,quinin, salicylic acid, mercury, arsenic, and many coal-tar derivatives,are apt to produce cutaneous eruptions. Some of these, as the bro- 606 DISEASES OF THE SKIN mides, iodides, and belladonna, usually produce a rash, others lessregularly do so. Some children, too, are very susceptible. The rashes caused by the administration of bromides are commonlypustular, less often furuncular and carbuncular. There may occasion-ally be some superficial ulceration; very rarely papillomatous orvegetative lesions occur. Bromide lesions do not leave any permanentdisfigurement, although the rash may persist for four or five weeksafter the bromides have been discontinued (Fig. 6i).. Fig. 65.—Tuberculosis cutis. TUBERCULOSIS CUTIS. The tubercle bacillus may also produce lesions of the skin, usuallysuppurative or ulcerative in character. These lesions are generallydue to the extension to the skin of some underlying tuberculous superficial skin is more or less destroyed, the edges are red andundermined, and the granulations thinly covered with pus. Thelesions spread slowly and cause very little pain. Occasionally thedisease assumes a papulopustular form, which is most commonly seenon the face and upper extremities. An ulcerative papillomatoustuberculosis occasionally occurs, and is, as a rule, found on the lowerleg or hand (Fig. 65). CHAPTER XXI. DISEASES OF THE EAR. Diseases of the ear are quite common in children at all infancy, otitis is usually primary, but in later child life itis commonly secondary to one of the exanthemata. FOREIGN BODIES IN THE EAR. The presence of foreign bodies in the ear is not usually att
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