RT Journal Article SR Electronic T1 Portosystemic Shunting in Superior Vena Cava Obstruction by Tumor Demonstrated on Ventilation–Perfusion Lung Scan JF Journal of Nuclear Medicine Technology JO J. Nucl. Med. Technol. FD Society of Nuclear Medicine SP 118 OP 119 DO 10.2967/jnmt.113.131375 VO 42 IS 2 A1 Ryu, Seung Wook A1 Waugh, Adrian A1 Allman, Kevin C. YR 2014 UL http://tech.snmjournals.org/content/42/2/118.abstract AB Extrapulmonary deposition of macroaggregated albumin particles on lung perfusion scintigraphy occurs in the presence of right-to-left shunting, as demonstrated in this case of portosystemic shunting related to superior vena cava obstruction by germ cell tumor of the mediastinum. The case demonstrates the importance of examining tracer deposition within the entire field of view on 99mTc-macroaggregated albumin perfusion lung scintigraphy for extrapulmonary findings.