PMC6597737_01
Postero-anterior view of her chest Xray illustrating an increased cardiothoracic ratio. Left upper translucency is apparent on the Xray.
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The first imaging modality, a postero-anterior chest Xray (Fig. 1) was initially reported as unremarkable.
(A) Transverse view of the CT chest showing hyperlucent left upper lobe and the main pulmonary artery which is larger than the aorta suggestive of pulmonary hypertension. (B) Coronal view of the CT chest showing hyperlucent left upper lobe (red arrow). (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
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Computerized tomography (CT) chest with contrast ruled out pulmonary embolism but revealed evidence of right heart strain, interstitial edema and hyperlucent left upper lobe consistent with CBA (Fig. 2).