After a short summary of the biological basis of the immune checkpoint inhibitors used for the treatment of nonhematologic solid tumors, the issues of pseudoprogression, hyperprogression, and immune-related side effects are discussed as well as their implications for patient management. Recommendations are provided for performing 18F-Fludeoxyglucose PET scanning, assessing tumor response, and reporting immune-related side effects, with representative clinical cases.
Keywords: FDG; Hyperprogression; Immune-related side effects; Immunotherapy; PET; Pseudoprogression; Therapy monitoring.
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