Table 4 Pseudoprogression and radionecrosis related to radiotherapy
Project | Pseudoprogression | Radionecrosis |
|---|---|---|
occurrence time | 3 months after radiotherapy | More than 6 months after radiotherapy |
MRI enhancement | irregular enhancement within the lesion,significant occupancy effect | significant delayed phase enhancement |
incidence rate | 20-30%, further observation gradually decreases or even disappears | 2-18%, progressive and irreversible |
18FDG PET-CT | Hypermetabolism | Hypometabolism |