The CT angiogram sign refers to vessels appearing prominent during a contrast enhanced CT as they traverse an airless low attenuation portion of consolidated lung. Although initially thought to be specific for bronchoalveolar carcinoma, it has now been recognized as a generic appearance provided the density of consolidation is relatively low. This sign has been associated with:
- bronchoalveolar carcinoma
- pulmonary lymphoma
- infectious and post-obstructive pneumonia
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