Fig. 3. Radiological findings of a 54-year-old female patient (Case 2). A: MRI shows invasive adenoma invading right cavernous sinus. B: Postoperative MRI shows subtotal removal status of pituitary adenoma. C: MRI shows newly developed bulging contour in the left cavernous sinus with adjacent dural thickening. D: After repetitive administration of steroid, follow up MRI shows decreased dural thickening lesion in the left cavernous sinus.