In a patient with a right medullary cerebrovascular accident causing new left-sided arm and leg weakness, dysphagia, aphasia-like speech problems, and diplopia, does this affect hearing?

Right Medullary CVA and Hearing Effects

A right medullary stroke with the symptoms you describe (left hemiplegia, dysphagia, aphasia-like speech, and diplopia) would NOT typically affect hearing, as the medulla does not contain auditory pathways. However, the clinical presentation you describe is anatomically inconsistent and suggests either a more extensive posterior circulation stroke or mischaracterization of the syndrome.

Anatomical Considerations

The medulla does not contain:

• Primary auditory pathways (these run through the pons via the cochlear nuclei and superior olivary complex)
• Cortical language centers (aphasia requires cortical involvement in the dominant hemisphere, typically left-sided lesions affecting Broca's or Wernicke's areas)

A pure medullary infarction (lateral medullary syndrome/Wallenberg syndrome) classically presents with:

• Ipsilateral facial pain/temperature loss
• Contralateral body pain/temperature loss
• Ipsilateral Horner syndrome
• Ipsilateral ataxia
• Dysphagia and dysarthria (not aphasia)
• Vertigo and nystagmus

When Hearing Loss DOES Occur in Posterior Circulation Strokes

Hearing loss in vertebrobasilar territory strokes occurs specifically with anterior inferior cerebellar artery (AICA) infarction, which supplies the internal auditory artery and labyrinth 1, 2, 3, 4. These cases demonstrate:

• AICA territory involvement causes ipsilateral hearing loss along with vertigo, facial palsy, and cerebellar signs 1, 2
• The internal auditory artery (branch of AICA) supplies the cochlea and vestibular apparatus
• Hearing loss can be the presenting symptom of life-threatening basilar artery thrombosis 3, 4

Critical Clinical Pitfalls

Your described presentation raises red flags:

1. "Aphasia" with right-sided stroke: True aphasia requires dominant (usually left) hemisphere cortical damage. Right medullary lesions cause dysarthria (motor speech difficulty), not aphasia (language disorder).

2. Left hemiplegia from medullary stroke: The medulla contains descending corticospinal tracts that haven't yet crossed, so a right medullary lesion would cause RIGHT-sided weakness, not left.

3. This constellation suggests:

   • Either bilateral or more extensive brainstem involvement
   • Possible vertebrobasilar dissection with multiple territory infarcts 1, 2
   • Mislocalization of the lesion (may involve pons or higher structures)

Recommendation for Evaluation

If hearing loss IS present with these symptoms, strongly consider:

• Extended AICA or vertebrobasilar territory involvement requiring urgent vascular imaging 5, 6
• MRI with diffusion-weighted imaging to map all infarct territories
• Vascular imaging (CTA or MRA) to assess for vertebral artery dissection or basilar artery occlusion 1, 2
• Audiometry to document and characterize any hearing deficit 6

The presence of hearing loss would indicate pontine (AICA territory) involvement, not isolated medullary pathology 3, 4.