Idiopathic intracranial hypertension: Imaging and clinical fundamentals

Figure 4 Posterior displacement of the pituitary stalk. A and B: Sagittal T2-weighted (A) and contrast-enhanced T1-weighted (B) magnetic resonance images display a pituitary gland of normal dimensions and shape (dashed circle) and a pituitary stalk with normal positioning (arrow); C and D: Sagittal T2-weighted (C) and contrast-enhanced T1-weighted (D) magnetic resonance images of a patient with idiopathic intracranial hypertension display an empty sella (dashed circle) and posterior displacement of the pituitary stalk (arrow), which appears to be pressed against the dorsum sellae as a result of the increased intracranial pressure forces.