Coexistence of true systemic sarcoidosis and Hodgkin's disease has been reported as a very exceptional occurrence. In this paper a case observed at the Institute of Radiology of Florence is described of which the most interesting features were 1) sarcoidosis appeared 5 years earlier than Hodgkin's disease; 2) at staging lymphography the paraortic nodes appeared extensively enlarged and showed multiple filling defects; 3) at laparotomy the nodes removed were histologically affected by sarcoidosis only; 4) multiple foci of sarcoidosis were found also in the spleen and liver; 5) this feature led us to refrain from irradiating the abdomen; 6) one year later a further enlargement of paraortic nodes was observed; 7) a second laparotomy revealed Hodgkin's infiltration in the removed nodes; 8) irradiation of the inverted "y" field was followed by complete regression of the nodes and the patient is alive and well 2.5 years after the relapse.