Common variable immunodeficiency: a clinical and laboratory evaluation of 15 cases.

The clinical and laboratory data for 15 patients with common variable immunodeficiency (CVI) (5 females and 10 males aged 3 years and 6 months to 40 years at first examination) were evaluated. The age of onset of infectious signs and symptoms ranged from 6 months to 35 years. Recurrent pulmonary infections predominated (86.6%), followed by chronic diarrhea (46.6%). Approximately 60% of the patients with pulmonary complaints presented chronic sequelae (bronchiectasis). Two developed a polymyositis-like picture. No neoplasms were observed. All patients presented immunoglobulin levels below 300 mg/dl and absence of antibody responses to poliovirus and to hemagglutinin. Two patients were negative when tested for autoimmunity. Cell immunity tested by the lymphoproliferative response in the presence of phytohemagglutinin was normal in 11 patients and depressed in 4. A decrease in the helper T population and inversion of the OKT4/8 ratio occurred in 13. Cimetidine treatment (1200 mg/day) applied to 5 patients for 4 weeks did not produce any clinical or laboratory improvement. Gamma globulin is the treatment of choice for these patients.