Retained surgical sponge on FDG-PET*

Intraabdominal gossypiboma in a 42-year-old woman who had undergone cesarean sections twice previously.
(A) Transaxial positive emission tomography (PET) image with uneven fluorodeoxyglucose (FDG) uptake at the rim of a mass.
(B) Coronal reconstruction showing the retained sponge (arrow) on PET computed tomography (CT).
(C) Excised surgical specimen showing retained sponge in situ.