Imaging Off Therapy/Surveillance
MRI of the brain and skull base or temporal bones without and with contrast is recommended during off therapy surveillance of a skull base or temporal bone tumor. (GRADE C, SOR 1.00, very strong recommendation) CT of the head without contrast for the skull base or CT temporal bone without contrast may provide complementary information during off therapy surveillance. CT, however, does not serve as a primary method of off therapy surveillance. Contrast-enhanced CT is not recommended for off therapy surveillance unless MRI is contraindicated.
Full body PET CT is recommended during off therapy surveillance of a skull base or sarcoma with metastatic disease at presentation. (GRADE C, SOR 1.0, very strong recommendation) Standard chest CT is typically concomitantly performed.