What is the cause of the reversed halo sign in this patient?

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W du Plessis

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du Plessis W. What is the cause of the reversed halo sign in this patient?. Afr J Thoracic Crit Care Med [Internet]. 2024 Oct. 14 [cited 2026 Apr. 18];30(3):e1574. Available from: https://samajournals.co.za/index.php/ajtccm/article/view/1574

References

1. Frankel SK, Schwarz MI. The pulmonary vasculitides. Am J Respir Crit Care Med 2012;186(3):216-224. https://doi.org/10.1164/rccm.201203-0539ci. 2. Gómez-Gómez A, Martínez-Martínez MU, Cuevas-Orta E, et al. Pulmonary manifestations of granulomatosis with polyangiitis. Reumatol Clín 2014;10(5):288-293. https://doi.org/10.1016/j. reumae.2014.03.007

3. Godoy MCB, Viswanathan C, Marchiori E, et al. The reversed halo sign: Update and differential diagnosis. Br J Radiol 2012;85(1017):1226-1235. https://doi. org/10.1259/bjr/54532316

4. Maturu VN, Agarwal R. Reversed halo sign: A systematic review. Respir Care 2014;59(9):1440-1449. https://doi.org/10.4187/respcare.03020