[28] An upper GI series is useful. A characteristic so-called bird's beak is usually seen in patients with achalasia. A dilated, sigmoid esophagus may be present in patients with long-standing ...

Ganguli et al. show that CDKN2A loss in Barrett’s esophagus prevents esophageal adenocarcinoma initiation by counterselecting subsequent TP53 loss and report context-dependent effects of 9p21 ...