Non-invasive and non-secreting pituitary adenomas are considered to be benign in the literal as well as the clinical sense ; however a recent meta-analysis ( Fernández-Balsells , et al. 2011 ) of available research has shown there are to date scant studies - of poor quality - to either support or refute this assumption .
Non-invasive and non-secreting pituitary adenomas are considered to be benign ( harmless ) ; but a recent large study ( Fernández-Balsells , et al. 2011 ) has shown there are few studies to prove if this is true or not .