 There is bilateral cerebellar ectopia with the right cerebellar tonsil extending 9 mm below the level of the foramen magnum, and the left 6 mm, providing MRI evidence of Chiari I malformation. Otherwise, limited brain images are unremarkable.High-resolution images of the sella demonstrate the pituitary gland to be normal in size measuring 6 mm in height. There is no discrete mass to confirm the presence of a pituitary microadenoma. There is no macroadenoma. The pituitary infundibulum inserts on the midline of the gland. There are no sellar, suprasellar or parasellar masses and the cavernous sinuses are symmetric bilaterally.
1.Negative pituitary MRI including gadolinium enhancement. Specifically, there is no discrete mass to confirm the presence of a pituitary microadenoma.2.There is bilateral cerebellar ectopia with the right cerebellar tonsil extending 9 mm below the level of the foramen magnum, and the left 6 mm, providing MRI evidence of Chiari I malformation.