Distinguishing between the T1a and T1b stages of esophageal carcinoma is critical for appropriate disease management, yet up to 60% of lesions may be incorrectly assessed if the evaluation is based on biopsy or endoscopic ultrasound (EUS), according to Mary P. Bronner, MD, Carl R. Kjeldsberg professor and division chief of anatomic pathology at the University of Utah in Salt Lake City.
http://www.gastroendonews.com/ViewArticle.aspx?d=In%2Bthe%2BNews&d_id=187&i=November+2012&i_id=905&a_id=22110
EMR Necessary for Accurate Staging of Esophageal Cancer