Tamiladu & Pondicherry Chapter of Indian Radiological and Imaging Association
Promoting the study and practice of Diagnostic Radiological Imaging Modalities in the states of Tamilnadu and Pondicherry
Answer to Quiz No. 82 dated 02 October 2016
Lateral medullary (wallenberg's) syndrome.
Findings
Acute infarct is seen in the right dorsolateral aspect of the medulla . Complete occlusion of intracranial segment of the right vertebral artery is seen.
Discussion
Lateral medullary syndrome, (or Wallenberg syndrome) is an acute ischemic infarct due to occlusion of the vessels supplying the lateral medulla oblongata; most commonly occlusion of intracranial portion of the vertebral artery followed by PICA and it's branches. This syndrome is characterised by: • vestibulocerebellar symptoms: vertigo, falling towards the side of lesion, diplopia, and multidirectional nystagmus. • autonomic dysfunction: ipsilateral Horner's syndrome, hiccups • sensory symptoms: initially abnormal stabbing pain over the ipsilateral face then loss of pain and temperature sensation over the contralateral side of body. • ipsilateral bulbar muscle weakness: hoarseness, dysphonia, dysphagia, and dysarthria, decreased gag reflex .
References
Dr Amir Rezaee and A.Prof Frank Gaillard et al.Lateral medullary syndrome. radiopaedia.org
Findings
Acute infarct is seen in the right dorsolateral aspect of the medulla . Complete occlusion of intracranial segment of the right vertebral artery is seen.
Discussion
Lateral medullary syndrome, (or Wallenberg syndrome) is an acute ischemic infarct due to occlusion of the vessels supplying the lateral medulla oblongata; most commonly occlusion of intracranial portion of the vertebral artery followed by PICA and it's branches. This syndrome is characterised by: • vestibulocerebellar symptoms: vertigo, falling towards the side of lesion, diplopia, and multidirectional nystagmus. • autonomic dysfunction: ipsilateral Horner's syndrome, hiccups • sensory symptoms: initially abnormal stabbing pain over the ipsilateral face then loss of pain and temperature sensation over the contralateral side of body. • ipsilateral bulbar muscle weakness: hoarseness, dysphonia, dysphagia, and dysarthria, decreased gag reflex .
References
Dr Amir Rezaee and A.Prof Frank Gaillard et al.Lateral medullary syndrome. radiopaedia.org
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