CD4 and peripheral arterial disease: Patient P6, a 32-year-old woman with suspected PAD who presented with reduced IgM and IgG4 and reduced numbers of CD4+ T cells with a medical history of atypical pneumonia (M. bovis), recurrent mild candida infections, vasculitis involving ascending aortic aneurysm, mild asthma, and transient presence of ANA autoantibodies, was initially treated with subcutaneous immunoglobulins and antifungals for C. albicans infection episodes.