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MR images of patient 1.
Pre- (A) and postcontrast (B) T1-weighted images reveal a homogeneously hypointense (compared with the pons) mass located in the middle portion of the pituitary gland with no enhancement of the lesion; these findings suggest a diagnosis of Rathke cleft cyst (5 × 6 mm). A normal anterior lobe was recognized in the parasagittal sections (not shown).
