CRTC1 and mucoepidermoid carcinoma: In a previous study of 95 cases of mucoepidermoid carcinoma, it was reported that the MAML2 split was positive in 62 cases, while the CRTC1-MAML2 fusion gene was positive in 37 cases, and the CRTC3-MAML2 fusion gene was positive in six cases by reverse transcription PCR; the combined sensitivity and specificity of these tests were 75% and 100%, respectively [14,15].