. Radiography, X-ray therapeutics and radium therapy . tumours are frequently the subject of great doubt, both clinicallyand radiographically. The latter method of examination is often called upon,to decide, if possible, the nature of a doubtful swelling. In all such casesgreat care must be exercised, and all methods of examination should beemployed. To make a positive diagnosis on the radiographic appearancealone is often misleading. The most malignant type of sarcoma, for instance, is, in the early stagesat least, indistinguish-able from a simple in-flammatory , more decidedfeat
. Radiography, X-ray therapeutics and radium therapy . tumours are frequently the subject of great doubt, both clinicallyand radiographically. The latter method of examination is often called upon,to decide, if possible, the nature of a doubtful swelling. In all such casesgreat care must be exercised, and all methods of examination should beemployed. To make a positive diagnosis on the radiographic appearancealone is often misleading. The most malignant type of sarcoma, for instance, is, in the early stagesat least, indistinguish-able from a simple in-flammatory , more decidedfeatures may be madeout, but it must beinsisted upon thatradiographically it isoften impossible todecide. The clinicalhistory, the radio-graphic evidence, andin most of the earlycases, at least, a freshradiograph of thesection at the time ofoperation should allbe employed. Thelatter method putsthe nature of the casebeyond all doubt, and decides at once the extent of the operation. The clinical and radiographical features of cases of tumour will be dealt. Fig. 147.—Sarcoma of lower end of femur. The bone has been sawn longitudinally in order to show thetumour in its interior. Tin- appearance of this tumour intin- amputated limb ami in the living subject are shown inPlate XXX., Figs. <■, e, ami/.
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