In a 72-year-old woman with 2 days of persistent vertigo, auditory disturbances, scalp numbness, and headache unrelieved by analgesics, what is the most likely diagnosis?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: October 21, 2026 • View editorial policy

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.

Ask Question

Posterior Circulation Stroke Until Proven Otherwise

This 72-year-old woman presenting with persistent vertigo, auditory disturbances, scalp numbness, and refractory headache requires urgent evaluation for posterior circulation stroke—specifically basilar or anterior inferior cerebellar artery (AICA) territory infarction—which is the most critical diagnosis to exclude given the combination of symptoms and high mortality risk.

Clinical Reasoning

The constellation of symptoms is highly concerning for a central cause rather than benign peripheral vertigo:

  • Persistent vertigo for 2 days = Acute Vestibular Syndrome (AVS)
  • Auditory disturbances = Suggests labyrinthine artery or AICA involvement
  • Scalp numbness = Focal neurologic deficit indicating central pathology
  • Headache unrelieved by analgesics = Red flag for vascular event

Why Stroke Must Be Ruled Out First

In patients presenting with AVS, the prevalence of cerebrovascular disease is approximately 25% and may reach 75% in high vascular risk cohorts 1. Critically, 75-80% of patients with AVS related to infarct have no focal neurologic deficits 1, making clinical examination alone unreliable. The presence of scalp numbness in this patient represents a focal neurologic finding that substantially elevates stroke probability.

The combination of vertigo with auditory symptoms specifically suggests AICA territory infarction, which characteristically presents with vertigo, tinnitus, and hearing loss 2, 3. One case series found that 74% of patients with vertigo and sudden hearing loss demonstrated posterior canal dysfunction, consistent with labyrinthine artery involvement 4.

Immediate Diagnostic Approach

Step 1: Perform HINTS Examination (If Expertise Available)

The Head-Impulse-Nystagmus-Test-of-Skew (HINTS) examination, when performed by specially trained practitioners, has demonstrated 100% sensitivity versus 46% for early MRI in detecting posterior circulation infarct 1. However, testing by non-experts shows mixed results 1, so this should not delay imaging if expertise is unavailable.

Common pitfall: Do not rely on HINTS performed by non-experts to rule out stroke in this high-risk presentation.

Step 2: Urgent MRI Brain (Preferred) or CT Head

MRI brain without and with IV contrast is the gold standard 1. Studies show that 11% of patients with acute persistent vertigo but no focal neurologic signs had acute infarct on imaging 1. The addition of gadolinium contrast improves detection of inflammatory, infectious, or demyelinating processes 1.

If MRI is unavailable or contraindicated, non-contrast CT head can detect acute infarct in up to 11% of AVS patients 1, though it is less sensitive than MRI for posterior fossa lesions.

Differential Diagnosis (In Order of Urgency)

1. Posterior Circulation Stroke (MUST EXCLUDE FIRST)

  • Basilar artery occlusion 2
  • AICA infarction 3, 4
  • Vertebrobasilar insufficiency 5

2. Labyrinthitis/Labyrinthine Infarction

If imaging excludes stroke, this becomes likely given the auditory symptoms 4

3. Vestibular Migraine (Lower Priority)

While VM can present with vertigo and headache 1, 6, the scalp numbness and refractory headache make this diagnosis less likely until vascular causes are excluded. VM typically has migrainous features (photophobia, phonophobia, visual aura) 1 and does not require imaging for diagnosis, but imaging is mandatory here due to red flags.

4. Vestibular Neuritis (Unlikely)

Does not explain auditory symptoms or scalp numbness

Critical Red Flags Present in This Case

  • Age 72 = High vascular risk
  • Scalp numbness = Focal neurologic deficit
  • Auditory disturbances = Suggests labyrinthine/AICA involvement
  • Persistent symptoms for 2 days = Not transient
  • Headache unrelieved by analgesics = Vascular event concern

Management Algorithm

  1. Immediate: Activate stroke protocol, check vital signs, glucose
  2. Within 1 hour: MRI brain with and without contrast (or CT if MRI unavailable)
  3. If stroke confirmed: Thrombectomy window assessment (mechanical thrombectomy can result in full recovery even in basilar occlusion 2)
  4. If imaging negative: Consider labyrinthitis, obtain audiometry, vestibular function testing
  5. Only after stroke excluded: Consider vestibular migraine or other benign causes

The presence of scalp numbness as a focal neurologic sign combined with audiovestibular symptoms in a 72-year-old mandates urgent neuroimaging to exclude life-threatening posterior circulation stroke before considering any benign diagnosis.

References

1
Guideline

acr appropriateness criteria® dizziness and ataxia: 2023 update.

Journal of the American College of Radiology, 2024

3
Research

Recurrent audiovestibular disturbance initially mimicking Ménière's disease in a patient with anterior inferior cerebellar infarction.

Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology, 2008

Related Questions

What is the etiology of vestibular migraine?
In a 47‑year‑old healthy woman with recurrent vertigo for three months, unresponsive to meclizine and with a previously negative work‑up, what is the appropriate next diagnostic and therapeutic approach?
What is the appropriate next step in management for a 27-year-old male who experienced two episodes of vertigo with spontaneous resolution, had negative emergency department laboratory and cardiac evaluations, no red‑flag findings on exam, and is currently asymptomatic?
How should I evaluate a 39-year-old female presenting with dizziness and fatigue?
How should I initially manage a 32-year-old patient presenting with mild headache, nausea, and dizziness?
What are the secondary causes of enuresis in adolescents and how should they be assessed?
What is the recommended next management for a 35‑year‑old patient with left C5 cervical radiculopathy from a disc herniation, 97 days after symptom onset, who has resolved acute and nocturnal pain, normal cervical range of motion, intact motor strength, but persistent position‑dependent neck pain, mild numbness, and low‑grade radiating symptoms on cervical extension, chin‑tuck, and reclined dental‑chair posture?
What is the best treatment for an adult woman with nonspecific oral stomatitis?
What are the recommended antibiotic regimens for treating infected panniculitis?
How should bilateral patellofemoral pain be managed?
What is the incidence of human papillomavirus infection in inverted papillomas?

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.