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MALIGNANT TUMOUR AT SITE OF BONE PLATINGA. McDougall
1. A case is described in which a malignant tumour developed in the soft tissues at the site of a bone-plating operation performed thirty years before. 2. The plate and screws were found to be composed of dissimilar metals and a difference of potential existed between them. 3. A careful consideration of the history and clinical course indicates that the tumour arose because of the presence of the metals.
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