Pre & post-contrast MRI of the brain shows: * No abnormal signal change visualized at DW images. * No abnormal contrast enhancement after GD-DTPA. * No abnormal signal change visualized at gradient images. * Intact gray-white matter differentiation. * Ventricles are not dilated. * No mass effect or midline shift. * Pituitary gland is not enlarged. * Midline pituitary stalk. * No aneurysmal dilatation or vascular narrowing visualized at MR angiography. * Paranasal sinuses are well aerated. * Both middle ear & mastoids are well aerated. * No definite abnormality at both orbits.Essentially negative study.