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Fig. 6A —78-year-old man with mucinous gastroesophageal junction tumor. High-resolution T2-weighted image (A) shows high-signal-intensity submucosa (arrowhead), interpreted as submucosal edema by all three interpreters; however, corresponding histology (B) reveals mucinous adenocarcinoma. On MRI, muscularis propria appears thinned on right side because of invasion of tumor (arrow). This misinterpretation accounted for four of seven images where MRI measurement underestimated tumor thickness.