Response to inhaled granulocyte-macrophage colony-stimulating factor in patient with mild-to-moderate autoimmune pulmonary alveolar proteinosis-24 months of follow-up.

Introduction: Autoimmune pulmonary alveolar proteinosis (aPAP) is a disease caused by IgG antibodies against granulocyte-macrophage colony-stimulating factor (GM-CSF). Whole lung lavage (WLL) allows to remove the lipo-proteinaceous material accumulated by the poor clearance of alveolar surfactant. However, it is a complex technique that is not exempt from complications, and in some cases, the patients are refractory, requiring the performance of several WLLs spaced apart in time.

Materials And Methods: We present the clinical, functional, and radiological evolution after 24 months of follow-up of a patient diagnosis of aPAP refractory to WLL, with performed three therapeutic WLLs spaced 16 and 36 months and serious potentially fatal complications in the last one.

Results And Disscusion: After 24 months, no adverse effects have appeared and the great clinical, functional and radiological response is maintained. The patient has been successfully treated with inhaled recombinant human GM-CSF sargramostim.