Manual of pathology : including bacteriology, the technic of postmortems, and methods of pathologic research . is at themost dependent points of entranceand exit of the bronchusmay be seen. No shredsof blood-vessels or ofother bronchi or bron-chioles are to be seenin the wail or extendinginto the cavity. Recog-nition of the cause mayaid in differentiation.^ The absence of tuberclebacilli and of anatomictubercles in the wall, ofcourse, excludes tuber-culosis. The cavity oftencontains accumulatedsecretion, and this is fre-D quently fetid, owing tosaprophytic infectionand decomposition.
Manual of pathology : including bacteriology, the technic of postmortems, and methods of pathologic research . is at themost dependent points of entranceand exit of the bronchusmay be seen. No shredsof blood-vessels or ofother bronchi or bron-chioles are to be seenin the wail or extendinginto the cavity. Recog-nition of the cause mayaid in differentiation.^ The absence of tuberclebacilli and of anatomictubercles in the wall, ofcourse, excludes tuber-culosis. The cavity oftencontains accumulatedsecretion, and this is fre-D quently fetid, owing tosaprophytic infectionand may open theD peribronchial lymph-atics and infection ofthe contiguous tissuemay ensue, giving riseto pulmonary abscessor to gangrene. Tumors of the bron-chi, as primary growths,are exceedingly rare. Bronchioiiths/ socalled, rarely arise inthe bronchi, although itis possible that inspis-sated secretion mightcalcify if retained suffi-ciently long. Concre-tions of this kind usuallyresult from calcified 1 Stem, Deut. med. Woch., 1904, xxx, No. 39, 1414. Atlee, Amer. Jour,of Med. Sci., July, Fig. 290.—Lung, Emphysema and Bronchiectasis. (Xatural size.) A. Emphysema vesicle. B. Enlarged peribronchial gland. C. Enlarged peribronchial gland, pigmented. D, D, D. Dilated bronchi. ORGANS OK UKSPIUATION. 581 tuberculous areas or inlands wliich erode into the l)roncln. The ex-])ectoration of lung stones is usually associated with jjulmonary ex-cavation, and has been called lithogenous phthisis. In the case re-ported by Stern the patient couj^dicd up ;it least twenty such of these bodies are parts of exfoliated cartilaj^^e, and it is i)robablethat all containing true bone possess this origin. Chcinic allv 1)r(.n(liio-liths are composed of carbonate and phosphate of lini- Normal Structure. -Tlie bronchi, by dichotomous division, event-ually ternunate in the infundibula, around which are arranged theair vesicles. The ciliated epithelial cells lining th
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