. The American journal of roentgenology, radium therapy and nuclear medicine . ungs are rather pale, sometimesdry, sometimes edematous, dense, elasticand of a distinct rusty brown color. Microscopically the capillaries in thealveolar walls become greatly dilated and tree into the lung fields. In advancedcases the entire lung area may show thesechanges. The characteristic finding is anincrease in size and density of the hilusshadow. The borders of this shadow arehazv and indefinite. Radiating outward tortuous, so that they project in loops Into from it, the lung markings are Increased the alveo
. The American journal of roentgenology, radium therapy and nuclear medicine . ungs are rather pale, sometimesdry, sometimes edematous, dense, elasticand of a distinct rusty brown color. Microscopically the capillaries in thealveolar walls become greatly dilated and tree into the lung fields. In advancedcases the entire lung area may show thesechanges. The characteristic finding is anincrease in size and density of the hilusshadow. The borders of this shadow arehazv and indefinite. Radiating outward tortuous, so that they project in loops Into from it, the lung markings are Increased the alveolar cavities. The alveolar epithe- in width and density, but without beading. Hum and other cells are desquamated The surrounding lung tissue is less radiant into the air cells; fluid exudes from the than normal so that the markings appear tense capillaries, often with red blood- hazy and Indefinitely defined. These corpuscles. The smooth muscle In the changes may be accompanied by irregular septa that forms the vestibules In each areas of even density of rather large size,. Fig. 3a. Cardiosclerosis, auricular fibrillation, m\o-cardial insufTiciencv, with extensive changes in thelungs. Physical examination shoued coarse moist ralesat both bases, and dullness and diminished breathsounds at the right base. The plate has the generalhazy appearance characteristic of cardiac pneumo-fibrosis, with the marked increase in the hilus shadowsand general thickening along the course of the unusual appearance in this case is the areas ofsharply defined increased density in the right chestand the high flat diaphragm on the right side. Thiscould be interpreted as being due to changes in thepleura. lobule is greatly increased in bulk, andthe alveolar walls in extreme cases becomethickened and indurated by the appearanceof new connectI\e tissue (brown indurationof the lungs). The extent of change from the normalas seen with the .x-rays varies widely,depending upon the severity and du
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