PT - JOURNAL ARTICLE AU - Ryu, Seung Wook AU - Waugh, Adrian AU - Allman, Kevin C. TI - Portosystemic Shunting in Superior Vena Cava Obstruction by Tumor Demonstrated on Ventilation–Perfusion Lung Scan AID - 10.2967/jnmt.113.131375 DP - 2014 Jun 01 TA - Journal of Nuclear Medicine Technology PG - jnmt.113.131375 4099 - http://tech.snmjournals.org/content/early/2014/02/20/jnmt.113.131375.short 4100 - http://tech.snmjournals.org/content/early/2014/02/20/jnmt.113.131375.full 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.