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FIGURE 3. Pattern 3: incongruent findings of residual mass on CT with no 18F-FDG uptake indicating no viable cancer. A 49-y-old female patient with recurrent abdominal low-grade non-Hodgkins lymphoma, state after chemo- and radiotherapy. CT image (left) shows mild-to-moderate mesenterial lymphadenopathy (arrow). There is no abnormal 18F-FDG uptake (center) in same localization as shown on hybrid TET image (right). TET also localizes increased 18F-FDG uptake in left abdomen to physiologic colon excretion. Patient has been in continuous clinical remission for >14 mo.