CXCL13 and neoplasm: CXCL11 has angiostatic properties and promotes the migration of cytotoxic T lymphocytes toward tumors triggering tumor cell apoptosis (Berencsi et al., 2007) while CXCL13, a B cell attracting chemokine is responsible for the development of secondary lymphoid tissue in the gut (Carlsen et al., 2002).