Application of positron emission tomography/computed tomography in radiation treatment planning for head and neck cancers

Figure 2 Positron emission tomography/computed tomography discovers multiple primaries in a patient with a right lateral tongue cancer. A: PET/CT images revealed that in addition to an oral tongue tumor, this patient had a primary tumor of the soft palate (inferior white arrow) as well as the cervical esophagus (black arrow); B-D: The IMRT plan for this patient demonstrates all three tumors covered in the high dose CTV. PET/CT: Positron emission tomography/computed tomography; IMRT: Intensity modulated radiation therapy.