We analyzed the chest radiographic findings of 167 malignant lymphomas admitted to the Department of Radiology of Kyushu University Hospital during the period from January 1966 to December 1975. There were 97 reticulum cell sarcomas, 29 lymphosarcomas, 22 cases of Hodgkin's Disease and 19 were unclassifiable. Chest abnormalities were present in 69 cases (41%) either on admission or on follow up. Twenty nine (17%) of them showed the abnormalities on admission and 40 (24%), on follow up. They were noted most frequently in lymphosarcomas.
Of various radiographic manifestations, mediastinal and/or hilar lymphnode enlargement and pleural effusion predominated. Of those developing abnormalities on follow up, the frequency of lung infiltrates increased. The majority of them were shown as multiple nodules or diffuse infiltrates. These changes were seen to result from tumor extension or inflammation by autopsy or clinical examinations. Radiographic differentiation was most difficult in such cases.
