title: Upper zone opacity mimicking lung cancer.
authors.affiliation: Department of Medicine, All India Institute of Medical Sciences, New Delhi.
authors.forename: R
authors.initials: R
authors.lastname: Guleria
authors.forename: S K
authors.initials: SK
authors.lastname: Sharma
authors.forename: S
authors.initials: S
authors.lastname: Mukhopadhyaya
authors.forename: K L
authors.initials: KL
authors.lastname: Prasad
mesh_terms: D003937:Diagnosis, Differential; D004931:Esophageal Achalasia / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging; D008875:Middle Aged; D013902:Radiography, Thoracic