CXCR4 and peritonitis: (II) PET/CT: 1 Multiple enlarged lymph nodes (bilateral neck I–V, axillae, hila, mediastinum, abdomen, retroperitoneum, and iliac vessels) with mildly increased fluorodeoxyglucose (FDG) uptake and variable C-X-C chemokine receptor type 4 (CXCR4) expression; 2 Splenomegaly with diffuse CXCR4 expression, normal FDG uptake; 3 Diffusely increased FDG uptake and CXCR4 expression in bones, suggesting hypercellular marrow; 4 Peritonitis, scattered ascites; 5 Subcutaneous edema in neck/chest/abdomen/pelvis/bilateral thighs/buttocks.