. Röntgen ray diagnosis and therapy . sting bone tissue, theirthin osseous walls, and their trabecular formation furnish thestand-point for their skiagraphic study. Osteoporosis of the trabe-ulse means decalcification of the bony portion affected, which ex-plains their foggy shad-ows. Intraosseous tensionis responsible for the ex-pansion of the compactosseous layer, which isthus made graduallyweaker, and at last almostentirely disappears. Thuswe see that it is the ab-normal and indefinite out-line or even the entire ab-sence of the osseous cells,the cortex especially dis-appearing, which is mo
. Röntgen ray diagnosis and therapy . sting bone tissue, theirthin osseous walls, and their trabecular formation furnish thestand-point for their skiagraphic study. Osteoporosis of the trabe-ulse means decalcification of the bony portion affected, which ex-plains their foggy shad-ows. Intraosseous tensionis responsible for the ex-pansion of the compactosseous layer, which isthus made graduallyweaker, and at last almostentirely disappears. Thuswe see that it is the ab-normal and indefinite out-line or even the entire ab-sence of the osseous cells,the cortex especially dis-appearing, which is moreor less characteristic ofthe various types of osse-ous sarcoma in contra-distinction to other bonediseases. Fig. 226 shows skia-graph of alveolar sar-coma of superior maxillaand os chronic osteoperiostitis the walls appear irregular, too, butthe irregularity is one-sided, and there is a globular or spindleshape. In tuberculosis the shadow would be cloudy or osteomyelitis the cortex shows nearly normal Fig. 227.—Osteoma of Humerus. Osteoma, of course, shows the shape of the osseous deformity,but there is the normal architectonic structure. Fig. 227 illustratesosteoma at the outer aspect of the upper third of the humerus ina boy of five years. His history showed that there was a fall more NEOPLASMS 205
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