title: Pleural effusion in two children with histiocytosis X.
mesh_terms: D001706:Biopsy; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008168:Lung / Q000473:pathology; D008206:Lymphatic Diseases / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology; D008297:Male; D010996:Pleural Effusion; D011859:Radiography