TY - JOUR T1 - Reversed Halo Sign: A Systematic Review JF - Respiratory Care SP - 1440 LP - 1449 DO - 10.4187/respcare.03020 VL - 59 IS - 9 AU - Venkata N Maturu AU - Ritesh Agarwal Y1 - 2014/09/01 UR - http://rc.rcjournal.com/content/59/9/1440.abstract N2 - A reversed halo sign (RHS) is defined as the presence of a focal ring-shaped area of ground-glass opacity within a peripheral rim of consolidation. Although originally described in patients with cryptogenic organizing pneumonia, it has been described with several other noninfectious and infectious diseases, including fungal infections. Thus, it is imperative that a proper diagnosis be established before initiating treatment. In this article, we systematically review the literature (PubMed and Embase) for the associations of the RHS. We have also proposed a diagnostic algorithm for an approach to a patient with an RHS. ER -