"Response category F-18-FDG uptake at the primary site and nodes less than internal jugular vein (IJV). Complete metabolic response."
"Focal F-18-FDG uptake at the primary site and nodes greater than IJV but less than liver. Likely complete metabolic response."
"Diffuse F-18-FDG uptake at the primary site or nodes is greater than IJV or liver. Likely postradiation inflammation."
"Focal F-18-FDG uptake at the primary site or nodes greater than liver. Likely residual tumour."
"Focal and intense F-18-FDG uptake at the primary site or nodes. Residual tumour."
Expected headings
"Background"
"Criteria"
"Widely used options for therapy response assessment are clinical examination, histopathology, CT and MR imaging, however, they have variable diagnostic accuracy 1,2. Fluorine-18-FDG PET-CT is useful in the diagnosis, staging, therapy assessment, and follow-up of head and neck squamous cell carcinoma (HNSCC) 3,4. Pretreatment F-18-FDG PET-CT is useful in accurate staging and prediction of disease recurrence as well as survival 5. Post-treatment F-18-FDG PET-CT is useful in evaluating treatment response, detecting recurrence 6, predicting outcomes and survival 7,8."