A 63-year-old Japanese woman was diagnosed with breast cancer. 18 F-fluorodeoxyglucose positron emission tomography for staging showed the uptake of tracer in the left breast and esophagus (Picture 1, arrow). The maximum standardized uptake value of the esophageal lesion was 4.9. Esophagogastroduodenoscopy revealed a whitish, flat, elevated lesion in the esophagus (Picture 2, arrow). Magnifying observation using narrow-band imaging showed round epi-