False-positive V/Q scan mimicking massive pulmonary embolism.
Technical error is not usually considered among the many possible causes of false-positive lung scans. A case is presented where the inadvertent injection of Tc-99m MAA through a Swan-Ganz catheter resulted in radionuclide imaging mimicking massive pulmonary embolism. After reinjection in a peripheral vein, a repeat perfusion scan showed unremarkable findings. Lack of the appropriate clinical presentation and the rarity of massive perfusion defects are important clues to recognizing this unusual but misleading situation.
Armas
R R
RR
Department of Radiology, New York Medical College, Metropolitan Hospital, New York.
D000368:Aged; D002407:Catheterization, Swan-Ganz; D005189:False Positive Reactions; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008297:Male; D011655:Pulmonary Embolism / Q000000981:diagnostic imaging* / Q000453:epidemiology; D011877:Radionuclide Imaging; D013668:Technetium Tc 99m Aggregated Albumin / Q000008:administration & dosage; D014692:Ventilation-Perfusion Ratio
D013668:Technetium Tc 99m Aggregated Albumin