Manual of pathology : including bacteriology, the technic of postmortems, and methods of pathologic research . ilatation, the former in rare cases affectingthe entire heart; sclerotic changes in the pulmonary artery with orwithout dilatation may occur. Other organs—particularly the liver,spleen, and kidney—subject to the alterations of structure incidentto venous distention usually manifest that change. Atrophic or senile emphysema {senile atrophy of the lung, small-lunged entphysenia of Jenner) is, as its name indicates, a disease of ad-vanced life, and is essentially an atrophic lesion of a
Manual of pathology : including bacteriology, the technic of postmortems, and methods of pathologic research . ilatation, the former in rare cases affectingthe entire heart; sclerotic changes in the pulmonary artery with orwithout dilatation may occur. Other organs—particularly the liver,spleen, and kidney—subject to the alterations of structure incidentto venous distention usually manifest that change. Atrophic or senile emphysema {senile atrophy of the lung, small-lunged entphysenia of Jenner) is, as its name indicates, a disease of ad-vanced life, and is essentially an atrophic lesion of a lung in whichvers little, if any, distending force has been exerted. The chest issmall, the ribs are oblique, thus decreasing the diameters and dimin-ishing the capacity of the chest; the respiratory muscles are atrophie<land the lung is smaller than normal; the changes in the vesicles andsepta alreadv noted in substantive emphysema occur. The enlargementin the size of the vesicles is attributed to atrophy of the intersesicularwalls. The bronchi frequently show some dilatati^v- 1 . K-jUae are. FiC. J92.—PfLMOSARV —(Flullfrfr.) Kmphyscmatous enlargement of an infundihulum. h. .\tro-phied intcn-esicular septa, improperly called absorbed alveolarwalls, c. Pigment in the fibrous septum. 592 SPECIAL PATHOLOGY. usually absent; the lung commonly collapses on opening the chest,and, in contrast with large-lunged emphysema, not infrequently showsareas of congestion, edema, and infarction. There may be some doubtas to the propriety of classifying this condition with emphysema. Thefact that custom has established the precedent does not, of course,prove its correctness. A better knowledge of atrophy, occurring in thelung, would probably lead to the recognition in this form of emphy-sema of some atrophic manifestation analogous to that seen in othertissues in advanced life. Acute vesicular emphysema is observed in acute bronchitis andafter death from asphyxia; the
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