Figure 1
Magnetic resonance imaging of the pons. (A) Axial T2-weighted image shows bilateral, ill-defined hyperintensities in the central pons. (B) Diffusion-weighted imaging (b1000) demonstrates no evidence of restricted diffusion, and the corresponding ADC map (not shown) indicates preserved diffusion, suggesting a vasogenic component. (C) and (D) Follow-up imaging four weeks later shows complete resolution of the hyperintensities. The imaging pattern, in combination with clinical reversibility, is consistent with reversible pontine dysfunction due to osmotic injury. While the findings favor vasogenic edema, a mild form of osmotic demyelination syndrome (ODS) cannot be entirely excluded.