IL-1β expression in ovarian tissues. A. High expression in a section of ovarian carcinoma. Immunoreactions appeared in both the nucleus and cytoplasm of tumor cells (x200). B. Low/no expression in a section of ovarian tumor cells (x200). C. Kaplan-Meier analysis of overall survival of 96 patients with ovarian cancer with IL-1β high expression (solid line; n = 31) versus low/no expression (dashed line; n = 65).