Abstract
tendency to metastasis and necessitates complete removal of tumor as the most effective procedure of treatment. A new method of making a diagnosis of malignant tumor of the head and neck regions, by means of employing a catheter semiconductor detector, which the authors have developed, after injection of 32P intravenously previously, was performed in this case. As to the diagnostic efficiency, this method appears to be on equal basis with that of the biopsy with added advantages. The catheter part of the detector is small enough that it could be inserted into most of ENT cavities it could be applied repeatedly in different parts of the tumor without fear of causing metastasis, and in the midst of an operation the extent of the cancer involvement can be determined to which the removal may be necessitated. This investigation afforded a useful aid in diagnosis and treatment of malignant melanoma.
