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Figure 2. A 50-year-old man with follicular lymphoma: mesenteric panniculitis (MP) with meseneteric tumoural involvement before and after a favourable response to chemotherapy. (a) A fused PET/CT image shows increased 18F-FDG uptake in an 8 mm nodule (dashed arrow) in the background of MP (arrows). The latter appears as a mesenteric mass of inhomogeneous fatty tissue containing scattered soft-tissue nodules which are not 18FDG-avid. (b) PET/CT images at diagnosis (top images) and following chemotherapy (lower images) show regression in size of the nodule and disappearance of 18FDG uptake (arrows). No change is seen in the other findings of the MP.
