Autoimmune Thrombocytopenic Purpura Associated with Common Variable Immunodeficiency

^Background:

_{Common variable immunodeficiency (CVID)  is a condition characterized by antibody deficiency, and therefore susceptible to recurrent pyogenic infections, cancer and autoimmune diseases. It is a heterogeneous syndrome in primary immunodeficiencies and clinically the most important. Is often diagnosed in adulthood. Autoimmunity occurs in 5% of the general population, in patients with CVID the percentage increased to 20 - 48%, cytopenias being the most common cause of autoimmunity in these patients. Autoimmune thrombocytopenic purpura and autoimmune hemolytic anemia are the most common autoimmune consequences, occurring in 5% to 8% of all patients with CVID. Some patients develop these disorders before the diagnosis of CVID.}

^Methods:

_{We present the case of a woman of 45 year old, with a history of lower respiratory tract and urinary tract infections in recurrent. Pulmonary tuberculosis. Enter the program short-course treatment strictly supervised for pulmonary tuberculosis with appropriate response. Autoinmune thrombocytopenic purpura refractory to steroids (WWTP) for performing splenectomy.}

^Results:

_{Anti DNA antibodies, anti nuclear, anti-protease, C. ANCA/PR3 antimieloperoxidasa, serology for hepatitis B, C, HIV negative. Serum immunoglobulins were as follow: IgG, 158 mg / dL (normal 700 to 1600), IgM, 55 mg / dL (normal 40-230), IgA, 36 mg / dL (normal 70-400), and, IgE, 38.7 IU / mL (normal 0-100) in more than two occasions with values below two standard deviations. CD4 T lymphocytes (19%) CD4/CD8 ratio (0.54).}

^Conclusions:

_{Meets diagnostic criteria for Common Variable Immunodeficiency (CVID) and starting treatment with intravenous immunoglobulin at a dose of 400 mg / kg (every 21 days) with significant clinical improvement and has even managed to integrate into your daily activities. Today, he continues with danazol for WWTP. Therefore, CVID is necessary to consider in the differential diagnosis of autoimmune thrombocytopenic purpura and autoimmune hemolytic anemia in adults (1).}

^{Bibliography : 1. Miguel A Park, et al. Lancet 2008;372:489-502.}