. Diseases of bones and joints . Fig. 47. Same case as Figs. 44, 45 and 46, about one year after two dosesof salvarsan. The patient is well. Syphilis occurs in the joints in two well differ-entiated forms, which correspond to the synovialand bony forms of joint tuberculosis, and prob-ably in two others, one of which will be consid-ered later on under the head of the multiarticular, iEly, Medical Record, 1912, LXXXI, 1179. ioo DISEASES OF BONES AND JOINTS SyphiliticSynovitis progressive variety of Type I., and the other underthe head of Charcots joint. The rarer form of joint syphilis is a syno


. Diseases of bones and joints . Fig. 47. Same case as Figs. 44, 45 and 46, about one year after two dosesof salvarsan. The patient is well. Syphilis occurs in the joints in two well differ-entiated forms, which correspond to the synovialand bony forms of joint tuberculosis, and prob-ably in two others, one of which will be consid-ered later on under the head of the multiarticular, iEly, Medical Record, 1912, LXXXI, 1179. ioo DISEASES OF BONES AND JOINTS SyphiliticSynovitis progressive variety of Type I., and the other underthe head of Charcots joint. The rarer form of joint syphilis is a synovitiswhich occurs in the tertiary stage. It is a slow,almost painless affection most frequent in the knee,. Fig. 48. Skiagram of the shoulder joint of the multiarticular form of Type I. The patient was an adult of about 45 years. The cause was probably syphilis. Mark the rarefaction of the acromion andof the head of the humerus. showing little if any tendency to involve the bone,unless as the result of unwise operative joint is swollen, contains fluid, and is butslightly disturbed in its function. The essentialpathological lesion is probably a proliferation of the DISEASES OF BONES AND JOINTS 101 synovia with a resulting effusion in the joint cav-ity. The disease may easily be confused with syn-ovial tuberculosis. The results of treatment by mercury are usuallyprompt and satisfactory. A more severe and more frequent form of syph- syphiliticilis occurs as a proliferative inflammation of the Myelitismarrow and of the inner layer of the periosteumof the bone end, to which an inflammation of thesynovia may or may not be added. These, as wehave learned, are the essential lesions of


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