How should a 69-year-old man with left facial (mouth and lip) numbness and left hand weakness be evaluated and managed?

Immediate Emergency Department Evaluation for Acute Stroke

This 69-year-old man with left facial (mouth/lip) numbness and left hand weakness requires immediate emergency department evaluation for acute stroke—he is at HIGHEST risk for stroke recurrence and needs urgent brain and vascular imaging within 24 hours. 1, 2

Risk Stratification and Urgency

This patient falls into the VERY HIGH RISK category based on Canadian Stroke Best Practice guidelines 2:

• Unilateral weakness (left hand) = highest risk criterion
• Facial involvement (left mouth/lips) = additional motor/sensory deficit
• Symptoms suggest acute cerebrovascular event affecting motor and sensory pathways

The combination of facial numbness and hand weakness indicates involvement of the contralateral (right) hemisphere, specifically affecting the sensorimotor cortex or subcortical structures.

Immediate Management Algorithm

1. Emergency Department Triage (Immediate)

• Send directly to ED with capacity for advanced stroke care 1, 2
• Must have on-site brain imaging and ideally access to tPA/endovascular therapy
• Time is critical: If within 4.5-hour window, patient may be candidate for thrombolysis

2. Urgent Investigations (Within 24 Hours) 2

Brain Imaging:

• CT head (immediate) to exclude hemorrhage
• MRI brain without and with IV contrast (preferred for ischemic stroke detection) 3
• Noninvasive vascular imaging from aortic arch to vertex:
  • CTA or MRA to identify large vessel occlusion or stenosis 1, 2

Cardiac Evaluation:

• ECG without delay to assess for atrial fibrillation or acute coronary syndrome 1, 2

Stroke Severity Assessment:

• National Institutes of Health Stroke Scale (NIHSS) 4, 5
  • Facial movement (item 4): assess for facial droop
  • Motor arm (item 5): assess for drift or weakness
  • Sensory (item 8): assess for unilateral sensory loss

3. Blood Pressure Management

• Do NOT treat elevated BP unless 6:
  • Systolic >220 mmHg or diastolic >120 mmHg
  • Patient is candidate for thrombolysis (then maintain <185/110 mmHg)
  • Evidence of hypertensive emergency, cardiac ischemia, heart failure, or aortic dissection

Critical Differential Considerations

While stroke is the primary concern, the specific pattern of facial numbness with hand weakness requires consideration of:

Stroke Patterns:

• Cortical stroke: Right middle cerebral artery territory affecting face and hand areas of motor/sensory cortex
• Lacunar stroke: Small vessel disease in internal capsule or thalamus 7
• Brainstem stroke: Less likely given the specific distribution

Alternative Diagnoses to Exclude:

Guillain-Barré Syndrome (GBS):

• Can present with unilateral facial palsy and limb weakness 8, 9, 10
• Look for: preceding respiratory infection, areflexia, ascending pattern
• Key distinguishing features: GBS typically has bilateral/symmetric progression and absent reflexes

Structural Lesions:

• Tumor with perineural spread 3, 11
• Primary CNS vasculitis 12
• Requires MRI with contrast if stroke workup negative

Bell's Palsy:

• Isolated facial nerve palsy without hand involvement 13, 14
• This patient's hand weakness excludes isolated Bell's palsy

Common Pitfalls to Avoid

1. Assuming Bell's palsy when limb weakness is present—this combination demands stroke evaluation 13, 14

2. Delaying imaging for "minor" symptoms—even transient symptoms carry 10% stroke risk within first week 1

3. Treating elevated blood pressure inappropriately—permissive hypertension maintains cerebral perfusion in acute stroke 6

4. Missing the thrombolysis window—if symptoms began <4.5 hours ago, every minute counts for tPA eligibility 4

5. Inadequate vascular imaging—must image from aortic arch to vertex to identify treatable large vessel occlusion 1, 2

Monitoring and Follow-up

If stroke confirmed:

• Temperature monitoring every 4 hours for first 48 hours (maintain normothermia) 5
• Serial NIHSS assessments to detect clinical deterioration 5
• Eye protection if facial weakness impairs eye closure 13, 14

If initial workup negative:

• Comprehensive evaluation by stroke specialist within 24 hours 2
• Consider alternative diagnoses including GBS, vasculitis, or structural lesions
• MRI orbits, face, and neck with contrast if cranial neuropathy suspected 3

Reassessment or specialist referral indicated for 14:

• New or worsening neurologic findings at any point
• Incomplete recovery at 3 months
• Development of additional symptoms