Ki-67 is another marker of cell proliferation [14] and its prognostic significance has been reported in various tumours, including laryngeal carcinoma [15], salivary gland adenoid cystic carcinoma [16], mucoepidermoid carcinoma [17], hepatocellular carcinoma [18], breast carcinoma [19], and lung carcinoma [20]. The gene discussed is MKI67; the disease is mucoepidermoid carcinoma.