It is important to note the wide expression range of PTTG2 in various tumors types apart from pituitary tumors, such as testicular and liver tumors, and both ovarian tumor tissues and cell lines 7, whereas messenger (m)RNA levels of another member of the PTTG family, PTTG3, which aslo known as PTTG3P was only found to be expressed in both cell lines and tissues of ovarian tumors 8. Here, PTTG3P is linked to pituitary tumor.