![]() Įpidemiology, Etiology & Prognosis Ī study reviewing 25 cases of Wallenberg Syndrome found the incidence to be highest in middle-aged men at 55.06 years of age. Ī large study of 130 patients with MRI-identified infarctions limited to the lateral medulla found that lesions toward the rostral end of the medulla also tend to be more ventral and produce dysphagia, dysarthria, and facial paresis more frequently, and headache and gait ataxia less frequently, than lesions at the caudal end, which themselves tend to be more lateral. The dysphagia that occurs in the acute phase of Wallenberg syndrome can be particularly severe in comparison to hemispheric stroke victims, often requiring assisted feeding (often a nasogastric tube), though in cases of unilateral infarct of the lateral medulla, recovery is generally good, and it is thought to occur via a mechanism involving the unaffected side of the medulla. Incessant hiccups are highly correlated with the presentation of hoarseness and dysphagia and are likely due to infarction affecting the nucleus ambiguus. ![]() Horner's syndrome (constricted pupil & drooping eyelid)Īmong these, sensory symptoms & signs, gait ataxia, dizziness, and Horner's sign are the most common, with sensory symptoms & signs occurring in up to 96% of all lateral medullary infarct patients less common, but still present in at least 50% of cases, are dysphagia, hoarseness, vertigo, nystagmus, limb ataxia, nausea/vomiting, and headache.Dysphonia (difficulty with sound production).Contralateral reduction in trunk pain & temperature sensation. ![]()
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