English: Magnetic resonance imaging (MRI) of the brain and spinal cord: a, axial T2 image at the level of the pons showing an increased signal in the tegmentum (white arrows), which was completely resolved in the follow up scan acquired 3 weeks later; b, sagittal and axial T2 image of the spinal cord (c, d) showing cord swelling, particularly at the cervical level (white, dot arrow), with extensive hyperintensity in the central cord (d), which was also completely resolved in the follow up images (e) acquired 3 weeks later