BACKGROUND: Paroxysmal nocturnal hemoglobinuria (PNH) is a rare clonal hematopoietic stem cell disease characterized by acquired abnormalities in the phosphatidylinositol glycan class A ( METHODS: This study analyzed RESULTS: A diverse spectrum of acquired CONCLUSION: In conclusion, the somatic variants in Brazilian PNH patients displayed variability in both site distribution and type. Contrary to mutational hotspots observed in previous studies, none were identified in this cohort. No specific correlation between the clinical characteristics of hemolytic PNH patients and their variants was found, likely due to the extensive variety of mutations.