NAVLE（北美执业兽医考题）Day 671

A 4-month-old mixed breed puppy is presented with a 1-month history of generalized wobbliness when walking and head bobbing when attempting to eat. Owners do not think there has been progression of the symptoms. Based on the MRI findings, which one of the following choices is the most likely diagnosis？
一只4个月大的混种小狗在走路时有全身晃动的表现，在进食时会头部也会出现摇摆晃头，已经持续了一个月。畜主认为症状没有改善。根据MRI结果，下列哪个是最有可能的诊断？