Fig. 2From: Combined surgery and radiotherapy as curative treatment for tracheal adenoid cystic carcinoma: a case reporta, b Positron emission tomography-computed tomography before (a) and after (b) radiotherapy. The increased uptake of 18F-fluorodeoxyglucose at the level of trachea is not visible after the treatment. The increased uptake of 18F-fluorodeoxyglucose in correspondence with the superior pulmonary lobes refer to the local inflammation caused by radiotherapyBack to article page