MRI Head Without and With IV Contrast There is no relevant literature to support the use of MRI head without and with IV contrast in follow-up imaging or evaluation of suspected or known recurrence of treated cancer of the nasopharynx or EBV-associated unknown primary of the head and neck. The coverage of MRI of the head and its associated sequences may be insufficient to completely evaluate the primary site in the nasopharynx and will not include regional nodal staging. MRI head without and with IV contrast may be used to further delineate advanced intracranial extension of disease. MRI Head Without IV Contrast There is no relevant literature to support the use of MRI head without IV contrast in follow-up imaging or evaluation of suspected or known recurrence of treated cancer of the nasopharynx or EBV-associated unknown primary of the head and neck. MRI Orbits, Face, and Neck With IV Contrast There is no relevant literature to support the use of MRI orbits, face, and neck with IV contrast in follow-up imaging or evaluation of suspected or known recurrence of treated cancer of the nasopharynx or EBV-associated unknown primary of the head and neck. MRI Orbits, Face, and Neck Without and With IV Contrast MRI orbits, face, and neck without and with IV contrast has superior soft tissue contrast resolution, which facilitates assessment of local recurrence, and can be helpful in distinguishing it from treatment related change and for evaluating local tumor response. The superior soft tissue contrast resolution relative to CECT is critical in distinguishing recurrence from treatment changes and in the delineation of tumor recurrence, including extension into adjacent structures such as the orbits, skull base, and intracranial compartment, and the perineural spread of disease. MRI has been reported to detect up to 27.8% of deep-seated recurrences that were occult on endoscopic evaluation [142].
Staging and Post Therapy Assessment of Head and Neck Cancer. MRI Head Without and With IV Contrast There is no relevant literature to support the use of MRI head without and with IV contrast in follow-up imaging or evaluation of suspected or known recurrence of treated cancer of the nasopharynx or EBV-associated unknown primary of the head and neck. The coverage of MRI of the head and its associated sequences may be insufficient to completely evaluate the primary site in the nasopharynx and will not include regional nodal staging. MRI head without and with IV contrast may be used to further delineate advanced intracranial extension of disease. MRI Head Without IV Contrast There is no relevant literature to support the use of MRI head without IV contrast in follow-up imaging or evaluation of suspected or known recurrence of treated cancer of the nasopharynx or EBV-associated unknown primary of the head and neck. MRI Orbits, Face, and Neck With IV Contrast There is no relevant literature to support the use of MRI orbits, face, and neck with IV contrast in follow-up imaging or evaluation of suspected or known recurrence of treated cancer of the nasopharynx or EBV-associated unknown primary of the head and neck. MRI Orbits, Face, and Neck Without and With IV Contrast MRI orbits, face, and neck without and with IV contrast has superior soft tissue contrast resolution, which facilitates assessment of local recurrence, and can be helpful in distinguishing it from treatment related change and for evaluating local tumor response. The superior soft tissue contrast resolution relative to CECT is critical in distinguishing recurrence from treatment changes and in the delineation of tumor recurrence, including extension into adjacent structures such as the orbits, skull base, and intracranial compartment, and the perineural spread of disease. MRI has been reported to detect up to 27.8% of deep-seated recurrences that were occult on endoscopic evaluation [142].