“…Routine lymphography is now regarded as essential to the proper staging and treatment planning of patients with Hodgkin's disease (Macdonald 1969). It proves to be impossible in about 1 % of patients and is unwise in a slightly larger proportion because of allergy, respiratory embarrassment or recent irradiation of the thorax which may perhaps increase the slight risk of cerebral oil embolism (Rasmussen 1970).…”