Figure 18.
A known case of NEC with unknown primary site. Presenting with complaints of abdominal pain and cough, the biopsy from abdominal lesions showed metastatic carcinoma with neuroendocrine differentiation and positivity for CK7, synaptophysin and negativity for chromogranin and p40. Ki-67 index was 80-90%. The patient did not receive any treatment before the molecular imaging. [18F]F-FDG PET-CT scan (A) showed intensely FDG avid multiple liver lesions, lung nodules, skeletal lesions and mesenteric deposits with no uptake in above-mentioned lesions on [68Ga]Ga-DOTATATE PET-CT (B). The patient is NOT a suitable case for PRRT.