Reversed Halo Sign - Infectious and Non-Infectious Differential Diagnosis Definition: A focal rounded area of GGO surrounded by a crescent or complete ring of consolidation • Infectious Causes: Mucormycosis, Invasive aspergillosis, Paracoccidioidomycosis, Histoplasmosis, Slow-resolving pneumococcal pneumonia, Psittacosis, Legionellosis, Tuberculosis, Pneumocystis jiroveci pneumonia • Non-Infectious Causes: Granulomatosis with polyangiitis (Wegener), Eosinophilic granulomatosis with polyangiitis, Sarcoidosis, Dermatomyositis, Lung adenocarcinoma, Lymphomatoid granulomatosis, Cryptogenic organizing pneumonia, Pulmonary embolism, Lipid pneumonia @1min_idconsult #Reverse #Halo #Sign #Infectious #NonInfectious #Differential #Diagnosis #pulmonary
