title: Selective IgG subclass deficiencies in patients with recurrent sinopulmonary infections: report of two cases.
abstract: Two patients with recurrent sinopulmonary infections and normal total serum immunoglobulin levels were found to have selective deficiencies in IgG subclasses. The serum of one patient contained abnormally low IgG2 and IgG4; and the other was deficient in IgG4. Both patients responded to the treatment with high dose intravenous immunoglobulin. The experiences on these two cases strongly suggest that IgG subclasses should be checked in patients with recurrent sinopulmonary infections in face of normal total immunoglobulins.
authors.affiliation: Department of Pediatrics, College of Medicine, National Taiwan University, Taipei, Republic of China.
authors.forename: C C
authors.initials: CC
authors.lastname: Chou
authors.forename: K H
authors.initials: KH
authors.lastname: Hsieh
authors.forename: Y Z
authors.initials: YZ
authors.lastname: Lin
authors.forename: C K
authors.initials: CK
authors.lastname: Ting
authors.forename: J Y
authors.initials: JY
authors.lastname: Wang
mesh_terms: D002648:Child; D002675:Child, Preschool; D004406:Dysgammaglobulinemia / Q000150:complications* / Q000453:epidemiology / Q000628:therapy; D005260:Female; D006801:Humans; D017099:IgG Deficiency; D007074:Immunoglobulin G / Q000145:classification; D007136:Immunoglobulins / Q000008:administration & dosage; D007262:Infusions, Intravenous; D008297:Male; D012008:Recurrence; D012141:Respiratory Tract Infections / Q000276:immunology*
chemical_list: D007074:Immunoglobulin G; D007136:Immunoglobulins