Ischemic complications after resection of high-grade glioma are frequent and may constitute potential cause of false-positive results in postsurgical evaluation using 18F-fluorocholine PET/CT. On the other hand, hypoxia caused by ischemia promotes invasive glioma growth. We present 3 cases of patients with different grades of ischemic injury after resection of high-grade glioma. The combined interpretation of diffusion-weighted imaging and apparent diffusion coefficient map on MRI, in this clinical setting, is mandatory to avoid PET/CT misinterpretations.