BACKGROUND: Immune thrombocytopenia (ITP) can precede the onset of systemic lupus erythematosus (SLE) by months to years. CASE PRESENTATION: A 12-year-old girl weighing 46 kg came hospital with complaint 12 days-menstrual bleeding. The patient is weak, pale. Eyes, ENT, heart, lungs, abdomen: within normal limits, no petechiae. Laboratorium: Hemoglobin (Hb) 4.6 g/dL, leukocytes 12,930/uL, platel...