Intense <SUP>18</SUP>F-FDG activity in aortoiliac bypass graft mimicking infection A case report

초록

Rationale: F-18-fluorodeoxyglucose (F-18-FDG) positron emission tomography/computed tomography (PET/CT) has the potential to become an important imaging tool for the diagnosis of suspected aortoiliac bypass graft infection (AGI). Patient concerns: A 76-year-old man presented with incidental findings of intense F-18-FDG activity in previous operation site of aortobiiliac bypass graft in the initial staging of small cell lung cancer (SCLC). Diagnoses: Based on F-18-FDG PET/CT examination, preliminary differential diagnosis was AGI. Interventions: We performed laboratory tests and (67)Galliun-citrate (Ga-67) single photon emission computed tomography/computed tomography (SPECT/CT). Outcomes: He had no constitutional symptoms and abnormal laboratory test results suggesting AGI. CT scan of the abdomen and pelvis showed no abnormal findings. Also, Ga-67 planar scintigraphy and SPECT/CT imaging of the abdomen and pelvis failed to show abnormal Ga-67 uptake in the same site of aortobiiliac bypass graft with F-18-FDG uptake. Lessons: We present a case with postoperative inflammatory aortobiiliac bypass graft which was misdiagnosed as AGI based on intense F-18-FDG activity seen at PET/CT imaging.

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