Fig. 1

Findings before treatment. a Esophagoscopy shows a circumferential ulcerated lesion and stenosis 15–29 cm from the incisors. b–d Contrast-enhanced computed tomography (CT) image: abnormal circumferential wall thickening in parts of the cervical and most of the thoracic esophagus. Cervical lesion invading the adventitia (cT3). e–g Positron emission tomography (PET)-CT images show uptake in the cervical and upper esophagus and no uptake in the muscular layer of the middle and lower esophagus