MMP1 and neoplasm: The median concentration of salivary MMP-1 in patients with T0-1 (tumor diameter < 2 cm), T2 (2–4 cm), T3 (>4 cm), and T4 (tumor infiltrated to nearby tissue) was 429.6, 1975.9, 4620.1, and 2294.5 pg/mL, respectively.