CD4 and lymphoma: Furthermore, Hartmann et al. studied on 97 epithelioid cell-rich lymphomas that include 17 LLs, and they showed that the most LL cases extremely express cytotoxic T-cell markers and are different from other epithelioid cell-rich lymphomas, although CD8 was not consistently expressed with most tumors being CD4+ (Hartmann et al., 2011).