Finding the elusive and causative autoantibody: An atypical case of autoimmune hemolytic anemia

An isolated IgA-mediated autoimmune hemolytic anemia can present a diagnostic challenge. When a routine direct antiglobulin test (DAT) is negative but clinical suspicion remains high, further testing with monospecific antisera should be performed. As with IgG-mediated WAIHA, steroids are first-line treatment, though splenectomy is often required to achieve a durable treatment response.