Fig. 7.

Esophageal carcinoma with multiple systemic metastases reported by PET-CT in a 60-year-old man with dysphagia for 1 month. a, b PET-CT images showed a mildly elevated pelvic uptake nodule in the right pelvis, which was suspected to be metastasis. c, d Therefore, the radiologist was influenced by the previous esophageal carcinoma and PET-CT reports, ignoring typical neurogenic tumor signs such as the “target sign” and the close association with the sacral plexus nerve (arrows). Eventually, the right pelvic nodule was misdiagnosed as metastasis in the MRI report. This is a typical example of prior report bias