Left upper lobe sequestration presenting as an anterior mediastinal mass.
D000293:Adolescent; D001998:Bronchopulmonary Sequestration / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008479:Mediastinal Neoplasms / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed