Pulmonary alveolar proteinosis and Pneumocystis jirovecii infection in an infant with hyper-IgM syndrome caused by a novel CD40LG variant: a case report
Background Pulmonary alveolar proteinosis (PAP) is a rare interstitial lung disease. While autoimmunity is the leading cause of PAP in adults, the majority of pediatric cases occur secondary to immunodeficiency and opportunistic infections. Secondary PAP associated with CD40 ligand (CD40L) deficiency is extremely rare,...