Selective Immunoglobulin A Deficiency, Helicobacter pylori Infection, and Strongyloidiasis in a Patient with Adenocarcinoma of the Stomach.

Selective immunoglobulin A (IgA) deficiency is one of many congenital immunodeficiencies. It is associated with several medical condition. It has been shown to be associated with some types of malignancies, some autoimmune disorders, and even with some infections. Here we report a young male with selective IgA deficiency who also tested positive for Helicobacter pylori and strongyloidiasis at the time when he was diagnosed with stomach adenocarcinoma. The presence of IgA deficiency with multiple etiological possibilities such as infections and cancer makes this case unusual.