What is the CTA sign in thoracic non-Hodgkin lymphoma (NHL) imaging?

Updated: Mar 05, 2019
  • Author: Ali Nawaz Khan, MBBS, FRCS, FRCP, FRCR; Chief Editor: Eugene C Lin, MD  more...
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The CT angiographic (CTA) sign is visualization of an enhancing vessel within the area of consolidated lung. This is described in association with bronchoalveolar cell carcinoma and may also be seen with primary pulmonary lymphoma. Cavitation of nodules is rare before treatment. Calcification is found in less than 1% of cases before treatment, but it may suggest a more aggressive lesion. Calcification can be seen in 2-8% of cases after irradiation or chemotherapy.

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