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Table 1 Disease course from onset to the final outcome

From: Natalizumab-associated progressive multifocal leukoencephalopathy (PML) in multiple sclerosis (MS): “a case report from Ireland with review of literature, clinical pitfalls and future direction”

Hospital course

Event

Clinical features

Disease evolution on MRI brain

Treatment

Outcomes

Day 1

Visual disturbance, leg weakness, pain, and unsteadiness

• Right-sided hip weakness

• Ataxia

• Diplopia and nystagmus

PMLx related changes in cerebellum

Methyl prednisolone 5 days, cidofovir, mirtazapine, probenecid

deterioration

Day 16

Headaches, worsening blurry vision, and diplopia

• Symptoms improved next 2 days

• Mobility slightly improved

PML-related changes slightly more extensive

No changes made

Stable

Day 48

Prolonged generalized tonic-clonic seizure which lasted almost 50-min

• Decreased consciousness and right-sided Todd’s paresis.

• Mechanical ventilation, ICU admission

Progression of PML

Loaded with phenobarbitone, methyl prednisolone 5 days, and oral taper over next 2 weeks

Deterioration

Day 86

Worsened swallow, weak cough reflex, and difficulty clearing secretions, requiring suctioning

• Significant dysarthria

• Right hand weakness and impaired coordination

• Gradually worsening swallow and gait, now using wheelchair

• Bladder dysfunction

Progression of PML changes and features suggestive of worsening PML- and onset of IRISxx

Started on 5/7 course of IV immunoglobulins, antibiotics for recurrent aspirations, PEG tube inserted for feeding

Deterioration

Day 125

Seizure, eye flickering, and unresponsiveness, self-aborted less than a minute

• Nausea and vomiting

• Dysarthria started improving

• Truncal ataxia, completely wheel chair bound

Significant progression of PML and IRIS

IV methyl prednisolone 1 g for 5 days given followed by oral prednisolone taper over 2 weeks

Improvement

Day 158

Continued to improve mobility, still limited to wheelchair but sitting balance significantly improved

• Speech became clearer

• Truncal ataxia improved

• Swallowing improved

MRI not done

Transferred for long-term rehabilitation, stable at this point

Improvement

  1. xProgressive multifocal leukoencephalopathy
  2. xxImmune reconstitution inflammatory syndrome