Warm Autoimmune Hemolytic Anemia as the Initial Presentation of Systemic Lupus Erythematosus (SLE): A Case Report.

BACKGROUND Autoimmune hemolytic anemia is an acquired disorder resulting in the presence of antibodies against red blood cell (RBC) antigens causing hemolysis. Autoimmune hemolytic anemia is of 2 types, Warm antibody mediated and cold agglutinin disease. Warm autoimmune hemolytic anemia (warm agglutinin disease) usually presents with fatigue and other constitutional symptoms and is diagnosed by the presence of IgG antibodies. The disease can occur as idiopathic or secondary to other autoimmune diseases, infections, or even malignancies. The systemic lupus erythematosus (SLE) is an autoimmune disease prevalent in young females. Autoimmune hemolytic anemia can occur as a part of the SLE spectrum however warm autoimmune hemolytic anemia as the initial manifestation of SLE is extremely rare. CASE REPORT Here, we describe a unique case of a 32-year-old woman who presented with vague clinical presentation found to have warm autoimmune hemolytic anemia and further immunological and inflammatory work-up during and after hospitalization lead to the diagnosis of systemic lupus erythematosus. CONCLUSIONS The systemic lupus erythematosus (SLE) is an autoimmune chronic inflammatory disease with unclear etiology affecting multi organs. Variable presentation in addition to the lack of definite pathognomonic features or tests makes the diagnosis of SLE challenging. On the whole autoimmune hemolytic anemia can not only be part of other disease processes but can be an initial presentation, highlighting the importance of thorough work-up in patients presenting with autoimmune hemolytic anemia to aid in timely diagnosis and management of underlying secondary conditions. It is important for providers to be aware of various disease spectrums that contain autoimmune hemolytic anemia for day-to-day clinical practice.