XII, B, 3 Manlove: Balantidial Colitis 159 



necrotic material. Many of the teeth are missing, and those 

 present show extensive caries. At the left posterior angle of 

 the jaw there is a raised mass which measures about 7 centi- 

 meters in diameter and is elevated about 3 centimeters above the 

 surrounding tissue. This shows two sinuses, which penetrate 

 into the mass, and from them exudes a thick, creamy, puslike 

 greenish material. The mass involves the region of the left 

 parotid and submaxillary gland. The central part of it is necro- 

 tic and is filled with a greenish puslike material, and the cut 

 surface is compact, whitish, and firm. Rigor mortis is present 

 to some extent throughout the body, and suggillation is present 

 in the dependent portions of the body. 



On section there is practically no subcutaneous fat. The muscle 

 is light reddish brown and moist. 



The abdomen. The serosa of the entire intestinal tract, par- 

 ietes, and stomach is pale, moist, and apparently normal. The 

 diaphragm is normally located. All the abdominal viscera have 

 gravitated somewhat toward the pelvis. 



The thorax. The thymus is almost completely absent, and 

 fatty tissue has taken its place. 



The pleural sacs. The left pleural sac contains fibrous adhe- 

 sions in the apex, and the right pleural sac is free from adhesions. 

 Otherwise both sacs are moist, do not contain free fluid, and 

 appear normal. 



The lungs weigh 500 grams. They float very high in water 

 and are large, and crepitation is present throughout, except in 

 the apex of the left lung, where there is a consolidated area 

 of about 5 to 6 centimeters in diameter. Section through 

 this lung shows an abscess cavity of 3 to 4 centimeters 

 in diameter, which contains a thick, creamy grayish yellow pus 

 and whose walls are rough and necrotic. The lung tissue im- 

 mediately about the abscess is compact and whitish and contains 

 caseous material. Section through the lungs elsewhere shows 

 a smooth, moist reddish surface which is air-containing and 

 apparently normal. The pleura covering the lungs is pale gray 

 with black pigmented mottling. The bronchi have a grayish 

 color, and those of the left lung contain some puslike material. 



The heart. The pericardium and pericardial sac appear nor- 

 mal. The epicardium has a grayish color, and the coronary ves- 

 sels are tortuous. The heart itself weighs 176 grams. It is 

 rather firmly contracted. The tricuspid ring admits almost three 

 fingers, and the mitral ring admits barely two fingers. The en- 

 docardium covering the valves is thickened, firm, and somewhat 

 roughened. This is noticeable at the bases and the edges of the 



