Pharyngography after head and neck irradiation: differentiation of postirradiation edema from recurrent tumor.

Abstract

Double-contrast pharyngography is a useful means of diagnosing pharyngeal tumors in patients who have had radiation therapy. Radiographic signs of neoplasm (ulcer, mucosal irregularity, and a focal mass) can be used to distinguish recurrent tumor from nonmalignant changes after irradiation.