Clinical characteristics of acute myeloid leukaemia patients with a large number of azurophilic granules: A single‐centre retrospective study

Summary Large amounts of azurophilic granules are considered to be a morphological feature of acute promyelocytic leukaemia (APL). However, a small percentage of acute myeloid leukaemia (AML) patients also have a large number of azurophilic granules. A large cohort of 3210 AML patients in our hospital was screened to identify AML patients who had a large number of azurophilic granules. The clinical parameters of these patients were collected and compared with typical AML patients (control Group 1) and APL patients (control Group 2). The incidence of AML with a large number of azurophilic granules was 1.26%. The fibrinogen and D‐dimer levels of patients in the study group were more similar to those of patients in control Group 2, as was the incidence of bleeding events. Additionally, patients in the study group had higher FLT3‐ITD and NPM1 mutation rates than patients in control Group 1. Finally, patients in the study group had a higher 30‐day mortality rate than those in control Group 2 (24.2% vs. 9.09%) and showed a higher 30‐day mortality trend than those in control Group 1. Therefore, we should pay more attention to the prevention of coagulation dysfunction and bleeding events for these patients.