. The American journal of roentgenology, radium therapy and nuclear medicine . s-eal cartilage itself is much thicker thannormal, and its demarcation from thediaphysis is very indefinite. CONCLUSIONS I. The roentgen ray is of the utmost 2. The roentgenogram is pathognomonicof some diseases. 3. The roentgenograms are similar insome diseases. We should, therefore, neverforget the clinical findings, and carefullyweigh the evidence from all points ofview. 4. The roentgen ray should not be reliedupon in early cases of pathologic bone,because changes in structiu-e (density) arenot produced. Particul
. The American journal of roentgenology, radium therapy and nuclear medicine . s-eal cartilage itself is much thicker thannormal, and its demarcation from thediaphysis is very indefinite. CONCLUSIONS I. The roentgen ray is of the utmost 2. The roentgenogram is pathognomonicof some diseases. 3. The roentgenograms are similar insome diseases. We should, therefore, neverforget the clinical findings, and carefullyweigh the evidence from all points ofview. 4. The roentgen ray should not be reliedupon in early cases of pathologic bone,because changes in structiu-e (density) arenot produced. Particularly is this true intuberculosis and acute osteom^^elitis. 5. The pathologic process may not giveus a true picture due to the fact that theroentgenogram does not show differencein the composition of substances of thesame density. 6. The roentgenologist must continuewith earnest zeal in this comparativelynew field of diagnosis, and not feel cha-grined in a mistaken diagnosis. Rememberthat occasionally the pathologists disagreewhen they have access to the specimenbefore value as an aid in the diagnosis of many pio. 20. Same Case as Fig. 18; Taken Threebone and joint lesions. Months after Bone-Grafting. ROENTGEN PLEURITIS BY LLOYD BRYAN, SAX FRANCISCO, CAL. THE fact that roentgen ra}^ exposuresmay, at times, cause an irritation ofthe deep tissues such as the nerves, thekidneys, the pleura, the peritoneum andthe gastro-intestinal tract, has been re-ported by several German two cases of pleuritis, followingroentgenotherapy, are presented as furtherconfirmatory evidence. CASE I. Mrs. P., age 56, complaint—coryza. Physical examination showed dul-ness in the upper left chest and roentgenexamination, February 14, 1916, showeda smooth-edged tumor-mass extendingfrom the left hilus fon\ard and upward,apparently not involving the pleura. Treat-ments by a Coolidge tube were adminis-tered at a target skin distance of ten inches,through three millimeters of alum
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