Interesting image. Two primary colon cancers shown on FDG PET/CT performed to evaluate possible lung metastases from bladder cancer.

摘要

Patients with bladder cancer have a significantly higher likelihood of having a metachronous second primary malignancy. A 72-year-old man with a history of bladder cancer underwent FDG PET/CT scan to evaluate possible pulmonary metastases. The PET/CT images demonstrated that there were metabolically active lung nodules which were consistent with malign nancy. In addition, foci of hypermetabolism were noted in the liver, the left adrenal gland and the ascending and descending colon. Histopathological examination demonstrated that the foci of abnormal FDG activity in the colon were due to 2 distinct primary colon cancers. Due to the higher prevalence of a metachronous second primary tumor in patients with bladder cancer, caution is warranted in interpreting possible metastatic lesions on FDG PET/CT imaging in this clinical setting.