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A 60-year old male pressents with progressive difficulty in swallowing, vomiting and occasional regurgitation for the past 3 months. Barium studies showed marked dilatation of the upper esophagus with narrowing of the lower segment. Manometry showed absent esophageal peristalsis. Which of the following conditions is he most likely at risk of developing?
Mallory-Weiss syndrome
Peptic ulcer disease
Squamous cell carcinoma of the esophagus
Rupture of esophageal varies
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