For 11 patients, diagnoses of MN and PNH were concurrent: all had been referred for haemolytic anaemia with cytopenia, while three of them also presented evidence of thrombosis (patients numbers 2, 4 and 20). Remarkably, none of the patients experienced a thrombotic event during eculizumab treatment, but two patients (patients number 6 and 15) developed a thrombosis after eculizumab was discontinued. Reasons for not receiving eculizumab, despite transfusions needs, were early death from acute respiratory distress related to interstitial pneumonia for patient number 12 and very low life expectancy for two patients (patients number 9 and 14). [Extracted from the article]