Summary

The authors present a case of a 51-year-old woman with endometriosis who developed immune thrombocytopenic purpura. Her platelets dropped to 2×10⁹/l, and she had haemorrhage into her right endometrioma causing a large pelvic haematoma. She also had renal failure secondary to endometriosis compressing the right ureter. She was treated with immunoglobulin and steroids with subsequent recovery of platelet count and underwent ureteric stenting to prevent worsening renal function.