A regimen consisting of vincristine, prednisone, procarbazine and doxorubicin (OPPA) used in combination with radiation therapy for the treatment of female patients with childhood Hodgkin lymphoma with low-risk features. Or A drug used to increase the number of blood cells, especially platelets, in some cancer patients receiving chemotherapy. Oprelvekin is a form of interleukin-11 (a cytokine normally made by support cells in the bone marrow) that is made in the laboratory. It is a type of biological response modifier. Also called Neumega, recombinant human interleukin-11, and rhIL-11.