[Evaluation of gammagraphy in the differential diagnosis of cysts and renal tumors]. / Valoración de la gammagrafía en el diagnóstico diferencial de quistes y tumores renales.

In view of the problems posed by the diagnosis of intrarenal masses, the authors review 16 cases of patients with this pathology who have undergone renographic and gammagraphic studies. They obtain a high level of coincidence between the gammagraphic diagnosis and its subsequent surgical confirmation, a fact which indicates that the kidney gammagraph is of great diagnostic value. This may be due to the different vascularization of the pathological area which would allow for a greater indication by the tracer, rejecting the theory of parenchymatous intoxication by toxic tumour substances.