CD79A and infection: IgAN can be seen in association most commonly with liver disease, infections, autoimmune disorders, and malignancies [9]. The actual prevalence of secondary IgAN due to an underlying disorder, however, is difficult to discern. No distinct histological finding differentiates primary from secondary IgAN. In addition, the prevalence of mesangial IgA deposits can be 4-16% in some parts of the world, thus making it difficult to determine what is secondary IgAN and what is a coincidental finding of primary IgAN [10].