We found that the median (IQR) (median = 0.016; IQR = 0.003–0.105) expression of CYP26A1 mRNA in pharynx tumor tissues was found significantly lower than at oral tumor sites (median = 0.067; IQR = 0.019–0.254) (p = 0.036 < 0.05). The gene discussed is CYP26A1; the disease is pharynx neoplasm.