title: Squamous carcinoma in situ of the oesophagus in a patient with achalasia.
mesh_terms: D000328:Adult; D002278:Carcinoma in Situ / Q000150:complications* / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000150:complications* / Q000473:pathology; D004931:Esophageal Achalasia / Q000150:complications* / Q000473:pathology; D004938:Esophageal Neoplasms / Q000150:complications* / Q000473:pathology; D006801:Humans; D008297:Male