A mouse ovarian cancer cell line OV2944-HM-1 (HM-1) was i.p. inoculated to B6C3F1 immunocompetent mice, and mouse recombinant CXCL13 (rCXCL13) was i.p. administered 5 times every other day starting from day 1, and TLS formed in the omental tumor were evaluated on days 10–12. Here, CXCL13 is linked to ovarian carcinoma.