CRP and Absence of circulating granulocytes: It is worth noting that, in this study, CRP and PCT levels in children with agranulocytosis were also significantly higher than those in children without agranulocytosis, suggesting that the inflammatory response of children in ARDS complicated by hematological neoplasms with agranulocytosis was stronger, and children with immunosuppression were prone to severe infection, thus leading to rapid progression of the disease process.