CDH13 and pituitary gland adenoma: A follow-up study with larger sample size and better methodology, using quantitative real-time polymerase chain reaction on cadherin 13 (CDH13) and immunohistochemistry on E-cadherin and β-catenin, demonstrated the expected significantly lower expression levels of E-cadherin (100–102), CHD13 (101), and β-catenin (100, 102) in invasive pituitary adenomas, resulting from a more frequently methylated CDH13 and E-cadherin genes (101).