I have a 6 mm pituitary adenoma. The previous studies showed that, white matter changes and leftward deviated of the pituitary stalk. I just had a 4th study done because I'm having headaches, blackouts, shaking or nodding of my head, while in a focal stare. Short term memory is very bad. This study says... Non-specific white matter changes with small punctate foci of increased signal in the periventricular subcortical white matter. Slight fullness of the left lobe of the pituitary and the infundibulum is deviated slightly to the left. What does this mean??