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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1898 Excerpt: ...not undergo complete and permanent arrest, although for long periods there may be little or no evidence of its extension. Such cases not uncommonly develop the characters of the very chronic type already described, the cavity becoming dry and surrounded by indurated lung and the pleura undergoing extreme thickening. The presence of a lesion at both apices is quite consistent with the occurrence of arrest; it is, in fact, more common post-mortem to find lesions at both apices than at one only. The writer's results in 177 cases of obsolete tubercle were as follows: Right lung 35 Left 36 Both lungs 106 177 Dr. Sidney Martin ' in 42 cases obtained similar results: Right lung 12 Left 9 Both lungs 21 42 1 Brit. Mid. Journal, Oct. 31, 1891. As it is contrary to clinical experience to find both apices simultaneously attacked and for the lesions to be equally distributed through the upper lobes, it follows that in such cases one lung is affected after the other and probably after arrest has taken place. The special danger which attends the condition of quiescence or arrest in the cavity stage is the formation and rupture of a pulmonary aneurism. 2. The rate of progress in relation to the duration of the symptoms is a very important factor in prognosis in the early stage of pulmonary tuberculosis. Signs that softening is in progress in the upper lobe and that the lower lobe is extensively infiltrated, the disease having been present for only a brief period, are necessarily of unfavourable import. But, again, it must lie stated that many cases of an acute or subacute character at the outset subsequently undergo a favourable change, and a period of quiescence if not of arrest follows. 3. The condition of the unaffected lung should be carefully noted in all cases....

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