Importance of esophageal exfoliative cytology in achalasia.
D000230:Adenocarcinoma / Q000150:complications; D000368:Aged; D001706:Biopsy; D003581:Cytodiagnosis; D004931:Esophageal Achalasia / Q000209:etiology*; D004938:Esophageal Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging; D004945:Esophagoscopy; D006801:Humans; D008722:Methods; D008875:Middle Aged; D011859:Radiography; D013274:Stomach Neoplasms / Q000150:complications