A female，age 36，presents with esophageal obstruction for 6 years. Barium X-ray reveals bird’s beak shaped change of the lower section of the esophagus. The most likely diagnosis is

  • A: Esophageal cancer
  • B: Cardiac cancer
  • C: Esophageal leiomyoma
  • D: Cardiac achalasia
  • E: Esophageal diverticulum

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