Thursday, February 14, 2019

Halo Sign

Q: What is the "Halo sign" in pulmonary?

Answer: The halo sign is usually on the high resolution CT scan of chest. It is a ground glass opacity surrounding a pulmonary nodule or mass. It represents hemorrhage.

It is highly suspicious of  angioinvasive aspergillosis.

See picture and details by clicking the link at




Shroff S, Shroff GS, Yust-Katz S, Olar A, Tummala S, Tremont-Lukats IW. The CT halo sign in invasive aspergillosis. Clin Case Rep. 2014;2(3):113-4.

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