FDG PET/CT Combined With 3D CT Reconstruction in Diagnosing Inflammatory Granuloma Secondary to Fish Bone Perforation of the Ascending Colon.
Zu-Gui Li
✦ AI-curated · Sources linked
Case in brief
A 71-year-old woman with 5 weeks of right-sided abdominal pain was initially evaluated for hepatobiliary disease; ultrasound and MRI showed no hepatobiliary abnormality. MRI incidentally identified an ascending-colon mass suspicious for malignancy. FDG PET/CT with 3D CT reconstruction showed a linear hyperdense object embedded in the colonic wall, with focal wall thickening and intense FDG uptake. The findings suggested a foreign-body-induced inflammatory granuloma rather than a tumor, and colonoscopy with biopsy confirmed the diagnosis.
What made this case unusual
The fish bone perforation presented as an intensely FDG-avid ascending-colon mass suspicious for malignancy; 3D CT reconstruction depicted the linear foreign body within the bowel wall.
Diagnostic / clinical pearl
An FDG-avid colonic mass can reflect foreign-body-induced inflammation. Look for a linear hyperdense object on CT, which may help distinguish an inflammatory granuloma from malignancy.