title: Portosystemic shunting in superior vena cava obstruction by tumor demonstrated on ventilation-perfusion lung scan.
abstract: 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 (99m)Tc-macroaggregated albumin perfusion lung scintigraphy for extrapulmonary findings.
authors.affiliation: Department of PET/Nuclear Medicine, Royal Prince Alfred Hospital, University of Sydney, Sydney, Australia swk.ryu@gmail.com.
authors.forename: Seung Wook
authors.initials: SW
authors.lastname: Ryu
authors.affiliation: Department of PET/Nuclear Medicine, Royal Prince Alfred Hospital, University of Sydney, Sydney, Australia.
authors.forename: Adrian
authors.initials: A
authors.lastname: Waugh
authors.affiliation: Department of PET/Nuclear Medicine, Royal Prince Alfred Hospital, University of Sydney, Sydney, Australia.
authors.forename: Kevin C
authors.initials: KC
authors.lastname: Allman
mesh_terms: D006801:Humans; D008297:Male; D008479:Mediastinal Neoplasms / Q000150:complications*; D009373:Neoplasms, Germ Cell and Embryonal / Q000150:complications*; D055420:Perfusion Imaging; D012123:Pulmonary Ventilation; D013479:Superior Vena Cava Syndrome / Q000000981:diagnostic imaging* / Q000209:etiology* / Q000503:physiopathology; D014057:Tomography, X-Ray Computed; D055815:Young Adult
keywords: hepatology; lung scan; obstruction; portosystemic shunting; respiratory; vascular