It is used in the treatment of pituitary adenoma, where SSTR5 is more highly expressed than SSTR2 (Bruns et al., 2002; Chalabi et al., 2014; Godara et al., 2019; Gostelow et al., 2017; Iacovazzo et al., 2016). Here, SSTR5 is linked to pituitary gland adenoma.