“…[29] Compared with cyclophosphamide, doxorubicin, vincristine, and prednisolone (CHOP) regimen, rituximab and its use with intensified chemotherapy such as R-Hyper-cyclophosphamide, vincristine, doxorubicin, and dexamethasone and R-EPOCH (etoposide, prednisone, vincristine, cyclophosphamide, doxorubicin) might improve the response rate and survival outcome for patients with mediastinal NHL, especially for PMBCL. [29][30][31] Although Guech-Ongey et al [32,33] found acquired immune deficiency syndrome-related Burkitt lymphoma incidence declined at low CD4 counts, suggesting functional CD4 lymphocytes may be required for BL to develop, we consider lower CD4 counts to reflect more severe immunodeficiency, which is likely to cause opportunistic infections and other malignant tumors for patients with AR-NHL.…”