We found that in addition to PC3 cells, CCL20 was secreted by promyelocytic leukemia (APL) cell lines, NB4 and HL60, by primary blasts of patients with acute myelocytic leukemia, human HT-29 colon carcinoma cells as well as and by normal keratinocytes (Fig. 3D). The gene discussed is CCL20; the disease is acute promyelocytic leukemia.