 The floor of the sella is asymmetric, again downsloping towards the right. The rounded area of T2 hyperintensity along the lowered right side of the sella floor measures minimally larger. On the coronal T2-weighted images, the abnormality measures 9 mm in width, compared to 7 mm previously. The significance of this minimal change in size is doubtful given the different angulation between the two examinations resulting in slice selection mismatch. The focal abnormality is still associated with thin, partial rim enhancement and no central enhancement. There is also a contiguous line of ossification separating the lesion from the adjacent sphenoidal body marrow. It is difficult to determine whether this lesion arises from or is external to the pituitary gland. The pituitary gland otherwise continues to show normal, homogeneous enhancement. The pituitary stalk is not deviated. There is no suprasellar mass. There is no mass effect on the optic chiasm.The 5-mm cystic lesion with rim enhancement in the pineal gland is unchanged, most probably representing an incidental pineal cyst.Included brain is unremarkable. An unchanged small contrast enhancing focus involving the frontal bone along the left superior orbital rim is unchanged and probably reflects a small venous lake.
1.The tiny focal signal abnormality along the right side of the floor of the sella is stable to very minimally larger, allowing for differences in technique. While it is still difficult to determine whether this lesion arises from the pituitary gland or is external to it, the lack of significant size change over the one-year interval favors a benign etiology, with unchanged differential. Underlying chronic developmental asymmetry of the sellar floor remains possible.2.Unchanged small incidental pineal cyst.