Peritoneal Desmoplastic Small Round Cell Tumor on FDG PET/CT.
A 21-year-old man presented with 1-month intermittent abdominal pain and distension. Contrast-enhanced CT and 18F-FDG PET/CT demonstrated diffuse peritoneal thickening and multiple hypermetabolic masses, initially raising suspicion for malignant disease. Biopsy showed nests of small round blue cells within a desmoplast...