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[Radiologic evaluation of the invasiveness of obliterative esophageal tumors].

An original method of double contrast staining of the esophagus performed at the height of Muller's test has been developed and tried in 170 patients with obturating cancer of the esophagus. The composition and preparation of the mixture used is described, as well as the steps of the technique. The advantages of the new method in comparison with routine double contrast staining are demonstrated, for the extent of cancerous process in the caudal direction was accurately determined in each case. The authors recommend their method for surgical clinics and radiological departments to be used for determining the scope of surgical intervention and specifying the topometry before radiotherapy.