Manual of pathology : including bacteriology, the technic of postmortems, and methods of pathologic research . in whichcaseation had run riot. Tubercle bacilli, however, could be demon-strated. Cytodiagnosis offers aid in determining the character and originof exudates m the serous cavities. The method is discussed on p. 291. Actinomycotic serositis has been reported, but the condition israre; it is usually secondary to actinomycosis of some viscus coveredbv the peritoneum or pleura. The lesion is commonly chronic and thefungus mav be demonstrated in the exudate or granulation
Manual of pathology : including bacteriology, the technic of postmortems, and methods of pathologic research . in whichcaseation had run riot. Tubercle bacilli, however, could be demon-strated. Cytodiagnosis offers aid in determining the character and originof exudates m the serous cavities. The method is discussed on p. 291. Actinomycotic serositis has been reported, but the condition israre; it is usually secondary to actinomycosis of some viscus coveredbv the peritoneum or pleura. The lesion is commonly chronic and thefungus mav be demonstrated in the exudate or granulation pleurisy is usually due to infection from the underlyinghmg; the same is true of the pericardium; less frequently the latterstructure is involved secondarily to the mediastinal tissues. Actino- Proceed, of Path. Soc. of Phila.,Jan. 2q. IQ04. 478 SPECIAL PATHOLOGY. myeotic lesions of the serous membranes are often strictly localizedto the area in which infection occurred. Various serous membrane inflammations have been attributed tosyphilis, and in the meninges the chronic productive meningo-encepha-. FiG. 241.—Chronic, Adhesive, Ixdlrative, and Caseous Tuberculous Mediastixopericarditis. HeartAND Adjacent Mediastinal Structures. (Four-ninths natural size.) A. Trachea slightly distorted by pressure. B. Left bronchus, compressed by enlarged peribronchial lymph-nodes. C. Aorta; the arch is displaced to the right, the middle of the arch is elongated largely at the expenseof the descending portion. It is probable that a large part, but certainly not all, of this distortion is One of several caseous nodes on the mediastinal aspect of the pericardium; some of these mxlules are in-distinguishable from caseous masses that have arisen in the pericardial synechia. £. Area of caseous tubercu-losis, occupying fissure between the left auricle and corresponding ventricle. F. Caseous mediastinal (peri-tracheal) lymph-nodes. G. Thickened and adherent parietal layer of the
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