[Acute vertigo caused by cerebellar vascular accident]

Area of Science:

• Neurology
• Neuroimaging
• Vestibular System Disorders

Background:

• Cerebellar strokes, particularly small ischemic events, can present with subtle and varied initial symptoms.
• Early clinical signs may be non-specific, mimicking common vestibular conditions such as vestibular neuritis or endolymphatic hydrops.
• Delayed recognition of cerebellar strokes can hinder timely intervention and impact patient outcomes.

Observation:

• Initial symptoms of small cerebellar strokes include acute vertigo, unsteadiness, and unidirectional nystagmus.
• Associated symptoms like headache and blurred vision warrant close attention, as classical cerebellar signs may be absent or delayed.
• Vestibular neuritis, endolymphatic hydrops, and benign paroxysmal positional vertigo are differential diagnoses that can be mimicked.
• Clinical presentation evolves over days, with vertigo resolving and unsteadiness persisting.

Findings:

• Electronystagmography may confirm peripheral vestibular system integrity, potentially masking central causes.
• Cerebral CT scans may not detect ischemic lesions until several days after symptom onset.
• Magnetic resonance imaging (MRI) is significantly more effective for early detection of small cerebellar infarcts.

Implications:

• Prompt diagnosis of small cerebellar strokes is essential, even when initial symptoms are atypical.
• Timely treatment, including acetylsalicylic acid and kinesitherapy, offers a good prognosis for complete recovery.
• Increased awareness and utilization of advanced neuroimaging techniques like MRI are vital for managing these challenging cases.