title: Isolated IgG4 subclass deficiency and malignant lymphoma in a child with acquired immunodeficiency syndrome.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000150:complications*; D001402:B-Lymphocytes; D004406:Dysgammaglobulinemia / Q000150:complications*; D005260:Female; D006801:Humans; D017099:IgG Deficiency; D007223:Infant; D008223:Lymphoma / Q000150:complications*