title: Thymus simulating left upper lobe atelectasis.
abstract: Aberrant locations and configurations of the thymus may occur. This is illustrated in a seven month old boy. He had a finding radiologically interpreted as a left upper lobe atelectasis, but proved at thoracotomy to be the left lobe of the thymus which was normal except for the unusual location.
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D007223:Infant; D008297:Male; D001261:Pulmonary Atelectasis / Q000175:diagnosis / Q000000981:diagnostic imaging*; D011859:Radiography; D013950:Thymus Gland / Q000000981:diagnostic imaging*