PET CT
The use of PET CT in initial staging of skull base and temporal bone tumors should be tailored to individual patients and their specific type of tumor. Full body PET CT can be helpful in the preoperative staging of skull base and temporal bone RMS including at initial diagnosis, during on therapy follow up for patients with metastatic disease and during off therapy surveillance for patients with metastatic disease. Such evaluation is similarly true for the rare occurrence of other malignancies such as primary Ewing sarcoma in the skull base and temporal bone. For the assessment of metabolic response of rhabdomyosarcoma by FDG PET CT, it is still controversial whether FDG PET CT can predict treatment response38,39. Further studies are needed to determine the role of PET CT in predicting treatment response.