Circulating myeloid‐derived suppressor cells correlate with clinical outcome in Hodgkin Lymphoma patients treated up‐front with a risk‐adapted strategy

Summary In the attempt to find a peripheral blood biological marker that could mirror the dysregulated microenvironment of Hodgkin Lymphoma (HL), we analysed the amount of myeloid‐derived suppressor cells (MDSC), including the three main sub‐types (monocytic, granulocytic and CD34 + fraction). The absolute MDSC count was investigated in 60 consecutive newly diagnosed HL patients and correlated with clinical variables at diagnosis and outcome. Patients received standard‐of‐care chemotherapy with the exception of interim fluorodeoxyglucose positron emission tomography (PET‐2)‐positive patients, who were switched early to a salvage regimen. All MDSC subsets were increased in HL patients compared to normal subjects (P