The primary treatment of choice for CD is adenomectomy by transsphenoidal surgery (TSS). Surgical success rates are variable, ranging from 65 to 90 %, and depend on surgeon expertise [2, 3]. Furthermore, criteria and testing parameters for assessing immediate remission vary from center to center, making the interpretation of results challenging [4, 5]. Additionally, post-surgical recurrence of CD is not uncommon, with reported recurrence rates ranging from 3 to 47 % [6, 7], and an observed mean time to recurrence of 16–49 months [3]. For patients in whom pituitary surgery fails or is contraindicated, radiotherapy or medical treatment are alternative options.