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9% showed low signal intensity on susceptibility-weighted imaging. There was no diffusion restriction in any of the nonenhancing lesions. There was no significant difference in the prevalence of pituitary nonenhancing lesions according to magnetic field strength, age, gender, slice thickness, or 2D vs. 3D contrast-enhanced T1-weighted imaging sequence. Pituitary nonenhancing lesions were identified on contrast-enhanced brain MRI in 20.8% of pediatric patients, with no significant difference in the prevalence according to magnetic field