Patient: Male, 13Final Diagnosis: Pulmonary alveolar protinosis (autoimmune subtype)Symptoms: Dyspnea • general weakness • subfebrile episodesMedication: VincristineClinical Procedure: Bronchoscopy • bronchoalveolar lavage • CT scan • lung biopsy • GM CSF antibody testing • diagnosis confirmation • therapy with inhaled GM-CSF • bilateral lung transplantation • chemotherapy due to PTLDSpecialty: Pediatrics and NeonatologyObjective:Rare diseaseBackground:Pulmonary alveolar proteinosis (PAP) is a rare condition characterized by the intra-alveolar accumulation of surfactant-derived material, which impairs gas exchange and results in respiratory insufficiency. Two major subtypes of PAP are autoimmune and non-autoimmune PAP. The diagnosis relies on clinical presentation, ground glass opacities on CT scan, bronchoscopy with PAS stain of BAL fluid (BALF), lung biopsy with PAS-positive material in the alveoli, and the presence of anti GM-CSF antibodies in serum or BALF for an autoimmune subtype. The therapeutic approach to pediatric cases varies according to age and the general clinical state of the child; however, whole lung lavage (WLL) and inhaled or subcutaneous GM-CSF are generally first-line therapy.Case Report:We report a unique case of an autoimmune type of PAP in a 12-year-old boy, who underwent successful bilateral lung transplantation after inefficacious treatment with GM-CSF, and who developed post-transplant lymphoproliferative disease (PTLD) and was successfully treated with a chemotherapeutic protocol.Conclusions:Although lung transplantation is a rarely used therapeutic approach for patients with an autoimmune subtype of PAP, in cases of inefficacious treatment with other modalities, lung transplantation should be considered.
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