Figure 10. Suprasellar colloid cyst in a 44-year-old man with decreased visual acuity. Sagittal T1-weighted MR image shows a well-defined, homogeneously hyperintense suprasellar cyst (curved arrow) that displaces the optic chiasm upward (straight arrow), with intrasellar extension that compresses the pituitary gland (arrowhead). The cyst also showed homogeneous high signal intensity with T2-weighted sequences. The diagnosis (suprasellar colloid cyst) was confirmed at surgery.