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Classification of brainstem gliomas by MRI appearance. (A) Focal brainstem lesion on T1-weighted post-contrast sagittal image. (B) Dorsal exophytic brainstem lesion on sagittal non-contrast MRI. (C) Cervicomedullary lesion on T1-weighted post-contrast sagittal image. (D) Diffuse intrinsic pontine glioma lesion on T1-weighted post-contrast sagittal image.
