A 17-year-old female presents with a persistent right-sided headache for two weeks, a past history of episodic left-sided headaches for a year, left palatal weakness, a right extensor plantar response, a normal complete blood count, and an elevated erythrocyte sedimentation rate of 85 mm/hr; how should she be investigated and managed?

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Last updated: October 8, 2026 • View editorial policy

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Urgent Neuroimaging Required - Likely Cerebral Venous Thrombosis or Structural Lesion

This 17-year-old requires immediate MRI brain with MR venography (MRV) and should be admitted for urgent neurological evaluation given the combination of persistent headache with focal neurological signs (left palatal weakness, right extensor plantar response) and markedly elevated ESR (85 mm/hr).

Critical Red Flags Present

This patient has multiple concerning features that distinguish this from primary headache:

  • Focal neurological deficits: Left palatal weakness (cranial nerve IX/X) and right extensor plantar response (upper motor neuron sign) indicate brainstem/corticospinal tract involvement
  • Change in headache pattern: New right-sided headache in someone with prior left-sided episodic headaches
  • Persistent, progressive course: Two weeks of continuous symptoms
  • Markedly elevated inflammatory marker: ESR 85 mm/hr suggests systemic inflammation or thrombosis

Most Likely Diagnosis: Cerebral Venous Thrombosis (CVT)

The clinical picture strongly suggests CVT based on 1:

  • Headache progression over days to weeks is typical of CVT
  • Focal neurological signs occur in CVT due to venous ischemia/infarction
  • Young female - CVT predominantly affects this demographic
  • Elevated ESR - inflammatory markers are often elevated in CVT
  • Cranial nerve involvement can occur with lateral sinus or cavernous sinus thrombosis

CVT presents with headache in nearly 90% of cases, and focal deficits (hemiparesis, cranial nerve palsies) occur when venous ischemia causes brain injury 1.

Immediate Investigation Protocol

First-Line Imaging (Within Hours):

  1. MRI brain with MRV (preferred) 1:

    • MRI detects venous infarction, hemorrhage, and edema
    • MRV visualizes venous sinus thrombosis
    • Can be performed without contrast initially, though contrast-enhanced MRV increases sensitivity for transverse sinus stenosis

  2. If MRI unavailable: CT head with CT venography (CTV) 1

    • CTV has high sensitivity/specificity for venous sinus thrombosis
    • Less preferred due to radiation in young patient

Laboratory Workup:

  • Complete thrombophilia screen: Protein C, Protein S, antithrombin III, Factor V Leiden, prothrombin gene mutation
  • Autoimmune markers: ANA, anti-dsDNA, anticardiolipin antibodies, lupus anticoagulant (given elevated ESR, consider SLE, Behçet disease) 1
  • Inflammatory markers: CRP, additional ESR
  • Pregnancy test (mandatory in reproductive-age female)
  • Oral contraceptive use history (major CVT risk factor)

Additional Imaging if CVT Excluded:

  • MRI brain with gadolinium contrast: To evaluate for:

    • Brainstem lesions (glioma, demyelination)
    • Posterior fossa mass
    • Inflammatory/infectious processes (abscess, encephalitis)
    • Vascular malformations

  • MRA head and neck: If arterial dissection or aneurysm suspected

Alternative Diagnoses to Consider

If CVT is excluded, the differential includes:

  1. Brainstem glioma: Progressive cranial nerve deficits with long tract signs
  2. Multiple sclerosis: Young female, multifocal neurological deficits
  3. Vasculitis (primary CNS or systemic): Elevated ESR, progressive neurological deficits
  4. Posterior fossa tumor: Cranial nerve involvement with increased intracranial pressure
  5. Infectious/inflammatory: Brainstem encephalitis, neurosarcoidosis (elevated ESR)

Immediate Management

Before Imaging Results:

  • Admit to hospital for monitoring
  • Nothing by mouth until imaging excludes surgical lesion
  • Avoid lumbar puncture until mass lesion/increased ICP excluded by imaging
  • Monitor neurological status hourly

If CVT Confirmed:

  • Anticoagulation with therapeutic LMWH or unfractionated heparin even if hemorrhagic infarction present 1
  • Neurology/neurosurgery consultation urgently
  • Treat underlying cause if identified (infection, autoimmune disease)
  • Monitor for complications: Seizures (consider prophylactic antiepileptics), increased ICP, neurological deterioration

If Alternative Diagnosis:

  • Neurosurgical evaluation if mass lesion requiring biopsy/resection
  • High-dose corticosteroids if demyelination or vasculitis suspected
  • Antimicrobial therapy if infectious etiology identified

Critical Pitfalls to Avoid

  1. Do NOT dismiss as migraine variant: Focal neurological signs with elevated ESR demand structural imaging 1
  2. Do NOT perform lumbar puncture first: Risk of herniation if mass lesion present
  3. Do NOT delay anticoagulation if CVT confirmed: Even hemorrhagic venous infarction benefits from anticoagulation 1
  4. Do NOT attribute symptoms to "complicated migraine": True migrainous infarction is extremely rare (0.5-1.5% of strokes) and requires typical migraine aura with imaging-confirmed infarct in relevant territory 2

This patient requires same-day neuroimaging and admission - the combination of focal deficits, elevated ESR, and progressive headache indicates serious intracranial pathology until proven otherwise.

References

2
Research

A woman in her 40s with an unusual migraine attack.

Tidsskrift for den Norske laegeforening : tidsskrift for praktisk medicin, ny raekke, 2026

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