CD4 and neoplasm: The EOC-specific recruitment of CD4+CD25+FoxP3+ regulatory T-cells (Treg), tolerogenic dendritic cells (DC), B7-H4+ tumor-associated macrophages (TAM) and myeloid-derived suppressor cells (MDSC) fosters immune privilege and predicts reduced survival in EOC (Table 1) [23,36,44,59-62].