Journal of the Indian Medical Association July 1953

of P„ and measurement of the surface betactivity carried out over the suspected and normal sites at 2 6 12 24 and 48 hours after the administration of the radioisotope. [...] 118% 123% 1 00% DiscussioN The results of the present investigation show that in a great majority of cases (14 out of fifteen in this instance) it is possible to diagnose correctly malignancy by the injection of radio-phosphorus and subsequent measurement of the surface beta-activity over the supected and the corresponding normal sites. [...] This method in which the measurements are carried out in situ without the least disturbance to the affected tissues is therefore of great help in the diagnosis of malignancy in superficial lesions particularly when the findings of aspiration biopsy are negative. [...] Fluorine content of waters from all the sources in the village from which the patient hailed was detemined and the incidence of stiff-backs as related to fluorine content of the domestic waters was ascertained. [...] ACKNOWLEDGMENT Thanks are due to the Radiology Department of the K. G. Hospital for the reduction prints and clinical photgraphs the Superintendent K. G. Hospital for permission to publish the case notes and the Principal Andhra Medical College for the facilities provided.