MSR1 and lymphoma: Additionally, the presence of CD204+ macrophages in patients with refractory malignant lymphoma undergoing allogeneic hematopoietic cell transplantation was found to be associated with an unfavorable prognosis, which is potentially due to the immunosuppressive properties of these macrophages leading to impaired effector T-cell function and diminished graft-versus-lymphoma effects (149).