Of 79 prolactinoma cases, 8 patients had GP with a median age of 38 years (range 20–53), 75% (6/8) were male, with a median largest tumor dimension of 6 cm (range 4.6–7.7), and a median prolactin level of 2,500 μg/L (range 100–>13,000). Here, PRL is linked to neoplasm.