Ga-67-citrate scintigraphy was used in 17 patients with carcinoma of the esophagus as part of the preoperative evaluation. Intense concentration in the primary site was associated with an extensive tumor. In all patients but one in whom resection was attempted, the tumors were unresectable. Ga scintigraphy proved valuable in diagnosing metastatic foci below the diaphragm and in the left supraclavicular fossa. Of special interest were 3 patients in whom esophagoscopy and contrast radiography suggested a benign stricture. All had intense concentration of Ga at the esophagogastric junction, an indication that it was carcinoma.