| Literature DB >> 27540433 |
Shawn Karls1, Hani Hassoun1, Vilma Derbekyan1.
Abstract
A 67-year-old male presented with dyspnea for which lung scintigraphy was ordered to rule out pulmonary embolus. Planar images demonstrated abnormal midline uptake of Tc-99m macroaggregated albumin, which SPECT/CT localized to several thoracic vertebrae. Thoracic vertebral uptake on perfusion lung scintigraphy was previously described on planar imaging. Radionuclide venography and contrast-enhanced CT subsequently demonstrated superior vena cava (SVC) obstruction with collateralization through the azygous/hemiazygous system and vertebral venous plexus. SPECT/CT differentiated residual esophageal/tracheal ventilation activity, a clinically insignificant finding, from vertebral uptake indicative of SVC obstruction, a potentially life-threatening condition.Entities:
Keywords: Collateral circulation; Nuclear medicine; Pulmonary embolism; SPECT; Superior vena cava obstruction; Tc-99m-MAA
Year: 2016 PMID: 27540433 PMCID: PMC4977247 DOI: 10.1007/s13139-015-0372-y
Source DB: PubMed Journal: Nucl Med Mol Imaging ISSN: 1869-3474