. The American journal of roentgenology, radium therapy and nuclear medicine . Fig. 4. aorta. The lack of sharply defined edges indicates pulsation. to their proximity to large vessels, and itis only by a careful fluoroscopic study,the mass being viewed from differentangles, that it is possible to differentiatebetween the two conditions. Occasionally, Temiomata.—These resemble dermoidcysts in their location and general charac-teristics. They are usually flattened outagainst the anterior chest wall, and, accord-ing to Christian in Osiers Modern Medi- i84 Roentgenological Exa
. The American journal of roentgenology, radium therapy and nuclear medicine . Fig. 4. aorta. The lack of sharply defined edges indicates pulsation. to their proximity to large vessels, and itis only by a careful fluoroscopic study,the mass being viewed from differentangles, that it is possible to differentiatebetween the two conditions. Occasionally, Temiomata.—These resemble dermoidcysts in their location and general charac-teristics. They are usually flattened outagainst the anterior chest wall, and, accord-ing to Christian in Osiers Modern Medi- i84 Roentgenological Examination of the Mediastinum. Fig. 5. Hodgkins Disease. Enlargement of the mediastinal lymph glands. Theaxillary and supra-clavicular glands are also enlarged;this is especially noticeable upon the right side. cine, expand in three directions: upwardthrough the superior aperture of thethorax; laterally into the pleural cavity;downward between the heart and lungs. Hyperplasia of lymph nodes.—Thisusualhoccurs in children and is generally tubercu-lous, the glands often containing a depositof calcium, which is not found in malignantconditions. In adults the peribronchiallymph nodes may become enlarged andsclerosed, especially in miners and thoseexposed to dusty atmospheres. In othercases the hyperplasia may be the result ofmalignant metastasis or of Hodgkinsdisease. In the latter condition, glandularenlargements may be noticed both in theaxilla and in the neck; and the lungs maybe infiltrated, giving the impression of atuberculous process. In roentgenogramsthey are represented by shadows which areusually oval or elo
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