. Radiography and radio-therapeutics . Fig. 249.—A case of slowly growing mediastinal tumour—probably endothelial in origin—which gave rise topractically no symptoms other than slight shortnessof breath. 292 EADIOGRAPHY. Fig. 250.—A case of lympho-sarcoma of the media-stimim, extending outwards into the hiugs on bothsides. the mediastinum, invading the root nf tlie lung. They tend to produce metastases, and may be veryinahgnant; when well advancedthey lead to rapid emaciation. Sarcoma of the Lung.—This generally arises in theInlands of the mediastinum, andspreading into the lung sub-stance by
. Radiography and radio-therapeutics . Fig. 249.—A case of slowly growing mediastinal tumour—probably endothelial in origin—which gave rise topractically no symptoms other than slight shortnessof breath. 292 EADIOGRAPHY. Fig. 250.—A case of lympho-sarcoma of the media-stimim, extending outwards into the hiugs on bothsides. the mediastinum, invading the root nf tlie lung. They tend to produce metastases, and may be veryinahgnant; when well advancedthey lead to rapid emaciation. Sarcoma of the Lung.—This generally arises in theInlands of the mediastinum, andspreading into the lung sub-stance by direct extension, thetumour tends to become solid,and may eventually compressthe lung towards the there is a rapidspread of metastases all overboth lungs. This type oftumour is frequently secondaryto a lesion elsewhere. From aradiographic point of ^dew itis often impossible to distin-guish between sarcoma and endothelioma and secondary history of an operation for removal of carcinoma or sarcoma of anotherpart of the body will often settle the diagnosis. A rapidly growing sarcomamay be disseminated all over the lung and pleura, but in the early stages thenodules will be small,
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