AZGP1 and oral cavity squamous cell carcinoma: In comparison to previous literature that reports increased AZGP1 staining in oral cavity squamous cell carcinoma with histologic evidence of maturation (keratinization), the vast majority (n = 12/14, 86%) of AZGP1-high OPSCC tumors in our cohort showed undifferentiated morphology (data not shown)36.