Assertion: esophagus's wall | /r/HasProperty | . 10
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text: Endoscopic ultrasound shows a characteristic alternation of hyperechoic and hypoechoic bands representing the different layers of the esophageal wall ( Fig. 10 ), and aiding especially in the diagnosis of intramural and extramural masses as well as in distinguishing a T1a (intramucosal) from T1b (submucosal) tumors, standard esophagoscopy not being able to contribute this level of detail.