A 28-year-old woman presented with pneumonia on 3 occasions but had no history of recurrent chest infections since childhood. Her medical history had intermittent diarrhea and bowel upsets for 2 days. Immunological investigations: IgG 3.12 (7.2-19.0) IgA 0.11 (0.8-5.0) IgM 0.66 (0.5-2.0) Blood lymphocyte subpopulations (x10 9/l ) Total lymphocyte count 1.6 (1.5-3.5) CD3 1.32 (0.9-2.8) CD4 0.88 (0.6-1.2) CD8 0.42 (0.4-1.0) B-lymphocytes CD 19 0.2 (0.2-0.4) Antinuclear antibodies and rheumatoid factor were not detected *Normal adult ranges shown in brackets.
What is the probable diagnosis? Click here for the answer *This patient case is from Docplexus Editorial Team for educative purpose only. Source: Essentials of Clinical Immunology
