Background: Graves’ disease is the most common cause of hyperthyroidism triggered by antibodies called thyroid-stimulating immunoglobulin (TSI) which stimulates an overproduction of thyroid hormones. Evans’ syndrome is a rare condition characterized by autoimmune hemolytic anemia and immune thrombocytopenic purpura. Systemic lupus erythematosus (SLE) is also an autoimmune disease with extreme heterogeneity and potentially involvement of any organ or system. It is well known when a patient is diagnosed with an autoimmune disease, it is about time to show up other manifestations of another one, just as it happened in this case report. Clinical Case: A 31-year-old pregnant woman (22 weeks) was admitted to the obstetric emergency room due to headaches, weakness and tinnitus. During anamnesis, she said she was diagnosed with hypertension several weeks before she was pregnant. At physical examination, a 160/100 mm/Hg blood pressure and a heart rate over 100 bpm were found. Initial tests were solicited congruent with severe thrombocytopenia (20 000/mm3) and severe anemia (6 gr/dl), there was also a modest increase in transaminases levels. Transfusion support was needed and a “HELLP syndrome” was diagnosed. Gynecologists decided to perform an emergency hysterotomy and the end of pregnancy. During the post-operative care and the following days, the patient persisted with an average of 100 bpm heart rate and hypertension despite of the use of antihypertensive medication. Physicians also noticed the presence of malar rash and goiter. Thyroid hormones levels where requested and the results were consistent with primary hyperthyroidism (TSH: <0.005 Mu/L, FT4: >100 pmol/L). Further tests were required such as TSI (positive), a thyroid scintigraphy (high thyroid uptake), antinuclear antibodies (ANA: + 1/160 speckled pattern, anti- Smith: +) and extractable nuclear antigen antibodies (ENA) panel. Grave’s disease and SLE were diagnosed. Rheumatologists suggested that the diagnosis of HELLP Syndrome was unclear and they strongly believed that thrombocytopenia and anemia during pregnancy were part of Evans’s syndrome and at the same time of SLE. Antithyroid drugs (thiamazol), beta blockers (propranolol) hydroxychloroquine and corticoids (prednisone) were given to the patient with an excellent clinical and biochemical response. Conclusion: A 25% of patients with SLE can be diagnosed with an autoimmune thyroid disease, such as Graves’ disease (1). Frequent evaluation of thyroid hormones and antithyroid antibodies should be performed in patients with SLE, especially when there are related symptoms of a thyroid disorder. References: 1.Chan AT, Al-Saffar Z, Bucknall RC. Thyroid disease in systemic lupus erythematosus and rheumatoid arthritis. Rheumatology (Oxford). 2001;40:353---4.