Paroxysmal nocturnal hemoglobinuria is a disorder resulting from acquired mutations in phosphatidylinositol glycan A (PIGA). What is the Pathology of Paroxysmal Nocturnal Hemoglobinuria? The pathology of paroxysmal nocturnal hemoglobinuria is: -Etiology: The cause of paroxysmal nocturnal hemoglobinuria is gene PIGA…