Imaging findings in a 67 year old woman with cT3 cN2b cM0-oropharyngeal carcinoma.

a. Fused PET/CT image shows enhanced glucose metabolism in the main tumor as well as in lymph node metastases cervical. b. A polygonal VOI, that include the entire lesion in the axial, sagittal and coronal planes, was placed in the PET dataset (SUV_max threshold 40%). The acquired PET parameters are as follows: SUV_max = 16.82, SUV_mean = 10.01, SUV_min = 6.56, MTV = 10.5, and TLG = 105.03. c. ADC map of the lesion. d. ADC histogram. The histogram analysis parameters (× 10⁻³ mm²s^-1) are as follows: ADC_min = 0.41, ADC_mean = 0.87, ADC_max = 1.85, P10 = 0.65, P25 = 0.73, P75 = 0.97, P90 = 1.13, median = 0.83, mode = 0.76, kurtosis = 6.24, skewness = 1.37, and entropy = 2.93.