MR Scan in January 2010. Coronal T1-weighted MR scan revealing a mass within the pituitary gland on the left (red arrow). The pituitary stalk is deviated to the right (blue arrow) as a result and the floor of the pituitary gland is sloping down to the left hand side (yellow arrow) eroding into the pituitary fossa. These findings are entirely consistent with a pituitary microadenoma.