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Figure 1 A 73−year−old man received one course of gamma knife radiotherapy (confor− mal stereotactic radiotherapy) for recurrent he− patocellular carcinoma, with a total dose of 45 Gy given within 1 month. Three days after finishing radiotherapy, he developed tarry stools. At esophagogastroduodenoscopy, he was found to have a large gastric ulcer on the lesser curvature and the anterior wall of the an− trum, which had an irregular shape and mar− gins (a) and several exposed vessels (b). U n u su alases an d tch n ialn o es

Acute gastric ulcer associated with gamma knife treatment (conformal stereotactic radiotherapy) of recurrent hepatocellular carcinoma