IL18 and benign prostatic hyperplasia: In the patients with BPH, in the prostate stroma, the level of TG correlated positively with the overall percentage of IL-18 (+) cells (R = 0.396, p = 0.007), the percentage of IL-18 (3+) cells (R = 0.496, p = 0.001), the percentage of IL-18 (2+) cells (R = 0.436, p = 0.003), and negatively with IL-18 (−) cells (R = −0.400, p = 0.006).