title: Systemic-pulmonary artery shunt: A rare cause of false-positive filling defect in the pulmonary arteries.
abstract: Computed tomographic (CT) pulmonary angiography is widely used for evaluation of pulmonary embolism. Intraluminal filling defects in the contrast enhanced pulmonary arteries are considered diagnostic of pulmonary emboli. We report a false-positive case where filling defects in the pulmonary artery were due to mixing of blood from a complex shunt or vascular malformation between the systemic arteries and pulmonary artery.
authors.affiliation: Department of Diagnostic Radiology, Khoo Teck Puat Hospital, Singapore.
authors.forename: Ashish
authors.initials: A
authors.lastname: Chawla
authors.affiliation: Department of Diagnostic Radiology, Khoo Teck Puat Hospital, Singapore.
authors.forename: Jerome
authors.initials: J
authors.lastname: Bosco
authors.affiliation: Department of Diagnostic Radiology, Khoo Teck Puat Hospital, Singapore.
authors.forename: Tze Chwan
authors.initials: TC
authors.lastname: Lim
authors.affiliation: Department of Diagnostic Radiology, Khoo Teck Puat Hospital, Singapore.
authors.forename: Vishal
authors.initials: V
authors.lastname: Gaikwad
authors.affiliation: Department of Diagnostic Radiology, Khoo Teck Puat Hospital, Singapore.
authors.forename: Raymond
authors.initials: R
authors.lastname: Chung
mesh_terms: D000072226:Computed Tomography Angiography; D005189:False Positive Reactions; D006801:Humans; D008297:Male; D008875:Middle Aged; D011651:Pulmonary Artery / Q000000981:diagnostic imaging / Q000503:physiopathology*; D011655:Pulmonary Embolism; D054079:Vascular Malformations / Q000000981:diagnostic imaging* / Q000503:physiopathology*
keywords: CT pulmonary angiogram; pulmonary embolism; systemic-pulmonary artery shunt; tuberculosis