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A 2-month-old female child with Tetralogy of Fallot and severe pulmonic stenosis. (A) Oblique axial reformatted image of the CTA showed hypoplastic pulmonary arteries due to pulmonic stenosis; (B) coronal maximum intensity projection (MIP) of the CTA depicted the dilated MAPCA (arrow) arising from the descending aorta and joining the right pulmonary artery; (C) VRT image showing the MAPCA in great detail. CTA, CT angiogram; MAPCA, major aortopulmonary collateral arteries.
