Diagnostic Approach to Persistent Dizziness with Neck Tension

Introduction to Diagnostic Steps

• The American College of Radiology recommends awaiting the pending MRI brain without contrast, as this is the appropriate imaging modality for presentations of persistent dizziness, and immediately referring to neurology for comprehensive vestibular examination including HINTS testing and evaluation for cervicogenic dizziness or vestibular migraine 1, 2

Imaging and Referral

• MRI is essential because CT brain has only 20-40% sensitivity for detecting posterior circulation pathology and misses most causes of persistent dizziness, with a diagnostic yield of 4-12% in persistent dizziness cases 1, 3
• A normal CT does not exclude serious neurological causes 2, 3

Specialized Examination

• The HINTS examination (Head Impulse, Nystagmus, Test of Skew) has 100% sensitivity for detecting posterior circulation stroke when performed by trained practitioners—more sensitive than early MRI 1, 2
• Dix-Hallpike maneuver and supine roll test should be performed to definitively rule out BPPV, as lack of response to treatment suggests either incorrect diagnosis or atypical presentation 1, 3

Alternative Diagnoses

• Vestibular migraine is characterized by dizziness with headache, photophobia, phonophobia, and temple/neck tension, requiring migraine prophylaxis and lifestyle modifications, not vestibular suppressants 1, 2
• Spontaneous intracranial hypotension can present with non-orthostatic headaches, dizziness, neck pain, and skull base symptoms, with MRI findings including diffuse dural and leptomeningeal enhancement 4, 5

Red Flags

• New severe headache different from current symptoms, focal neurological deficits, sudden hearing loss, inability to stand or walk, and new or worsening right-sided weakness or other asymmetric neurological symptoms require immediate emergency evaluation 1, 2, 4, 5

Management Algorithm

• Complete pending MRI brain without contrast within the next few days, and see neurology urgently for HINTS examination and vestibular assessment 1, 2
• If MRI shows dural enhancement, consider spontaneous intracranial hypotension and may need epidural blood patch 4, 5
• If HINTS suggests central cause, may need MRA/CTA of head and neck 1
• If vestibular migraine is diagnosed, start migraine prophylaxis (not vestibular suppressants) 2, 3