The pituitary tumour types occurring in these families are most commonly growth hormone-secreting adenomas (causing acromegaly or acromegalic gigantism), prolactin-secreting adenomas (prolactinomas) ...
Figure 2. Hand of a patient with acromegaly compared to a normal hand Adenomas developing from growth hormone-secreting cells cause acromegaly or acromegalic gigantism (if they start in childhood).