Pulmonary Mucormycosis in a Child Diagnostic by CT and the Importance of the Reverse Halo Signal in Differential Diagnosis

Mucormycosis or zygomycosis is an uncommon opportunistic fungal infection caused by fungi of the order Mucorales in the class Zygomycetes. It's far less common than other opportunistic fungal infections, such as Aspergillusand Candidainfections, although the mortality rate is much higher. The three most common primary clinical manifestations of mucormycosis are rhinocerebral, pulmonary, and cutaneous infections. The clinical manifestations include fever, cough, hemoptysis, and dyspnea. Diabetes mellitus is a common predisposing factor for mucormycosis. Pulmonary mucormycosis is the most frequent cause of the reversed halo sign in patients with hematologic diseases and those who have undergone bone marrow transplant two other pulmonary diseases.