Figure 9a. RCC in a 50-year-old woman with diplopia. Coronal T1-weighted (a) and T2-weighted (b) MR images show a well-defined intra- and suprasellar lesion that displaces the optic chiasm upward (arrowheads in a). The cystic contents have high signal intensity on the T1-weighted image and low signal intensity on the T2-weighted image, typical findings that indicate a high concentration of mucopolysaccharides (confirmed at surgery). The epicenter of the lesion is sellar. (Case courtesy of Yasser Ragab, MD, Cairo, Egypt.)