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Indian Journal of Pathology and Microbiology
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CASE REPORT
Year : 2018  |  Volume : 61  |  Issue : 3  |  Page : 418-420

Pulmonary alveolar proteinosis in children: An unusual presentation with significant clinical impact


Department of Pathology, Anand Diagnostic Laboratory, Bengaluru, Karnataka, India

Correspondence Address:
Jayaram N Iyengar
Anand Diagnostic Laboratory, Bowring Tower, 54 Bowring Hospital Road, Shivajinagar, Bengaluru - 560 001, Karnataka
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/IJPM.IJPM_17_17

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Pulmonary alveolar proteinosis (PAP) – an unusual diffuse lung disease characterized by alveolar accumulation of phospholipoprotein material, with a peak incidence in third to fourth decade and male predominance is also described in children. Recorded prevalence is 0.1/100,000 individuals. Major clinicopathogenetic subtypes include autoimmune (idiopathic) associated with granulocyte–macrophage colony-stimulating factor autoantibodies, secondary form, and the congenital form (associated with surfactant gene mutations). Common presenting features include dyspnea, cough, low-grade fever, inspiratory crackles, and digital clubbing. Pulmonary function shows a restrictive ventilatory defect. X-rays show bilateral patchy to extensive consolidations, and bronchial lavage yields a milky fluid. Characteristic microscopic findings on lung biopsy include filling of terminal bronchioles and alveolar spaces by deep pink granular PAS-positive material. Whole lung lavage is the safest and most effective form of treatment. We present brief profiles of two young children identified as having PAP, along with follow-up data on one of them.


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