RT Journal Article SR Electronic T1 CD4+ lymphocytopenia due to common variable immunodeficiency mimicking AIDS. JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 364 OP 366 DO 10.1136/jcp.47.4.364 VO 47 IS 4 A1 R S Kaczmarski A1 A D Webster A1 J Moxham A1 F Davison A1 S Sutherland A1 G J Mufti YR 1994 UL http://jcp.bmj.com/content/47/4/364.abstract AB There are an increasing number of published reports of patients with acquired immunodeficiency without evidence of HIV infection, who have been labelled as having "idiopathic CD4+ lymphocytopenia". The case is reported here of a young man who presented with Pneumocystis carinii pneumonia (PCP), CD4+ lymphopenia, and hypogammaglobulinaemia attributable to common variable immunodeficiency (CVID). The presentation of this condition, with many of the clinical and laboratory features of AIDS, highlights CVID as a diagnosis to be considered in the differential diagnosis of CD4+ lymphocytopenia.