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 

 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4184607/

#pulmonary
#radiology
#infectious-diseases 


Reference:

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.

 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4184607/