. The American journal of roentgenology, radium therapy and nuclear medicine . , or any other intrathoracic pathol-ogy discernible by roentgen ray. (;) Discrete mottling associated with con-spicuous enlargement of the mediastinalglands unassociated with any other intra-thoracic pathology discernible by roent-gen ray. (k) Mottling unassociated with hemorrhagicpneumonitis and enlargement of themediastinal glands, but associated withsome other intrathoracic pathology. (/) Hemorrhagic pneumonitis associated \vithpidmonary tuberculosis,(w) Hemorrhagic |)neumonitis associated \vithlobar pneumonia. (
. The American journal of roentgenology, radium therapy and nuclear medicine . , or any other intrathoracic pathol-ogy discernible by roentgen ray. (;) Discrete mottling associated with con-spicuous enlargement of the mediastinalglands unassociated with any other intra-thoracic pathology discernible by roent-gen ray. (k) Mottling unassociated with hemorrhagicpneumonitis and enlargement of themediastinal glands, but associated withsome other intrathoracic pathology. (/) Hemorrhagic pneumonitis associated \vithpidmonary tuberculosis,(w) Hemorrhagic |)neumonitis associated \vithlobar pneumonia. (») Lobar jineiunonia imcomiilicated by hem-orrhagic pneumonitis. (o) Cases in which there was definite clinicale\4dence of pulmonary- patholog\ but inwhich the serial rocntgenograi)hs failedto confirm the presence of a pulmonarylesion. Hemorrhagic Pneumonitis 21 = Roentgen Ray No. 5622. Group (e). Case illustrating hemorrhagic pneumonitis of all lobes associated withpleural eflfusion (bilateral). This was one of the early cases which formed the basis for the Fig. I. Macic in autopsy room. .\ote homogeneousdensity in all 3 lobes on right and both on left. Noterelative clearness of l)oth apices. The costophrenicangles are obscure<l by what proved to be this with Fig. 2 made of thoracic visceraafter removal in toto. Naturally the cases presenting a offered the greatest difficulty ininterjjretation. for we did not have pre-liminan. plates by which an estimatemight have been made of the previouslyexisting chronic lesions; such as peribron-chial adenitis, chronic parenchymatous,tubercular changes, etc. However, we weresoon enabled to identify the mottling byautopsy. It was foimd to be due to discreteinterstitial lesions, commonly held to bestreptococcic in origin. In our cases thesum total of mottled types was so smallas to be conspicuous. The total number of patients studiedroentgenographically was 470. Of these82 per cent, or 386.
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