OBJECTIVE: The purpose of this article is to describe diseases that may present with the reversed halo sign on high-resolution CT. We emphasize the tomographic features most frequently associated with this sign and correlate them with histologic findings. CONCLUSION: A wide spectrum of infectious and noninfectious diseases may present with the reversed halo sign on chest CT. The nonspecific nature of this sign should not cloud an otherwise fairly straightforward diagnosis, especially when associated background findings are typical. Although a rigorous analysis of associated CT findings may help with the differential diagnosis, histologic assessment is often needed for a definitive determination of the cause.
OBJECTIVE: The purpose of this article is to describe diseases that may present with the reversed halo sign on high-resolution CT. We emphasize the tomographic features most frequently associated with this sign and correlate them with histologic findings. CONCLUSION: A wide spectrum of infectious and noninfectious diseases may present with the reversed halo sign on chest CT. The nonspecific nature of this sign should not cloud an otherwise fairly straightforward diagnosis, especially when associated background findings are typical. Although a rigorous analysis of associated CT findings may help with the differential diagnosis, histologic assessment is often needed for a definitive determination of the cause.
Authors: Edson Marchiori; Gláucia Zanetti; Bruno Hochhegger; Klaus L Irion; Antonio Carlos Pires Carvalho; Myrna C B Godoy Journal: Lung Date: 2012-05-10 Impact factor: 2.584
Authors: M C B Godoy; C Viswanathan; E Marchiori; M T Truong; M F Benveniste; S Rossi; E M Marom Journal: Br J Radiol Date: 2012-05-02 Impact factor: 3.039
Authors: Igor Murad Faria; Gláucia Zanetti; Miriam Menna Barreto; Rosana Souza Rodrigues; Cesar Augusto Araujo-Neto; Jorge Luiz Pereira e Silva; Dante Luiz Escuissato; Arthur Soares Souza; Klaus Loureiro Irion; Alexandre Dias Mançano; Luiz Felipe Nobre; Bruno Hochhegger; Edson Marchiori Journal: J Bras Pneumol Date: 2015 May-Jun Impact factor: 2.624
Authors: Annemie Snoeckx; Pieter Reyntiens; Damien Desbuquoit; Maarten J Spinhoven; Paul E Van Schil; Jan P van Meerbeeck; Paul M Parizel Journal: Insights Imaging Date: 2017-11-15