title: Sustained B-lymphocyte immunodeficiency attributed to phenytoin therapy.
mesh_terms: D000293:Adolescent; D001402:B-Lymphocytes / Q000276:immunology*; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000139:chemically induced*; D008297:Male; D010672:Phenytoin / Q000009:adverse effects*
chemical_list: D010672:Phenytoin