Molecular Analysis of Persistent and Recurrent Barrett's Esophagus in the Setting of Endoscopic Therapy.

As expected, preablation tissue samples with higher grades of dysplastic BE and EAC had significantly more TP53 and APC mutations and tumor suppressor gene mutations overall, as well as a nonsignificant trend for more chromosomal arm level CNVs and oncogene amplifications (Table 1 ).

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