title: A large substernal goiter as a cause of a pulmonary perfusion defect.
abstract: A pulmonary perfusion defect was caused by an extremely large anterior mediastinal mass subsequently proved by I-131 imaging to be an intrathoracic extension of a cervical goiter. Substernal goiter is not known to be reported previously as one of the causes of a perfusion defect in lung scanning.
authors.affiliation: Department of Nuclear Medicine, William Beaumont Hospital, Royal Oak, Michigan 48072.
authors.forename: H R
authors.initials: HR
authors.lastname: Balon
authors.forename: D A
authors.initials: DA
authors.lastname: Meier
mesh_terms: D000368:Aged; D005260:Female; D006045:Goiter, Substernal / Q000150:complications / Q000000981:diagnostic imaging*; D006801:Humans; D007457:Iodine Radioisotopes; D008168:Lung / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D013670:Sodium Pertechnetate Tc 99m; D013668:Technetium Tc 99m Aggregated Albumin
chemical_list: D007457:Iodine Radioisotopes; D013668:Technetium Tc 99m Aggregated Albumin; D013670:Sodium Pertechnetate Tc 99m