IP Indian Journal of Anatomy and Surgery of Head, Neck and Brain

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Get Permission Mohan S, Somarajan, and Dharman: Subacute sclerosing panencephalitis (SSPE): Late onset of measles complication - Case of IVIG treatment failure


Introduction

Subacute sclerosing panencephalitis (SSPE) is characterized by gradual deterioration of cognitive motor and cognitive functions. SSPE more often occurs in individuals who had a history of measles viral infection. The annual incidence of SSPE is reported to be 10-20 per million populations. The virus can remain inactive or dormant for years, after which an inflammatory response against infected cell occurs. The inflammatory response then give rise to proliferation of astrocytes, lymphocytic and plasma cell infiltration, neuronal degeneration. Electroencephalogram, CSF analysis for anti-measles IgG remains as a strong diagnostic parameter. 1, 2, 3, 4

Case Report

A 8 year old male child was bought to the care center with generalized weakness and had recurrent falls to one side or forward since 2 months. He was the third child born to NCM parents. The antenatal period was found to be uneventful as reported by the parents. His mother reports that he had developmental delay, but remained asymptomatic prior to 2 months of presentation. Fall towards one side or front occurred daily lasting 30 minutes after waking up. Mother says the frequency of falls has reduced over past 1 week. He had history of 6 episodes of focal seizure (L). Also, the child had reduced attention, educational regression +, altered sleep pattern, occasional twisting movements of upper limb and intermittent tonic posturing. Mother says there were tightening or stiffening of UL & LL along with urinary and bowel incontinence, since 3 – 4 days.

Upon liaison, it was understood that the child had a past history of measles infection at the age of 3 years. Neurological examination revealed severe cognitive decline, positive SNOUT reflex and positive PALMOMENTAL reflex. All hematological and biochemical examination were normal.

The electro-encephalogram (EEG) analysis revealed stereotyped polymorphic discharge seen periodically, suggestive of SSPE.

The CSF study was carried out, which also revealed a highly positive CSF measles IgM antibody titer.

Table 1

Cranial nerves analysis

Cranial nerves

Characteristics

I

Nil special

II

Bilateral PEARL, No visual defects

III, IV, VI

No ptosis, No restriction of EOM

V

No jaw deviation

VII

No facial palsy

VIII

Nil special

IX, X

GAG reflex +, palate: central

XI

Nil special

XII

No tongue deviation

Table 2

Motor Reflexes Analysis

Motor reflex

Characteristics

Tone

Cogwheel rigidity + in all 4 limbs

Power

Moving all 4 limbs, > 3/5 in all 4 limbs

Reflex

Choreoathetoid movements +

In view of recurrent jerky movements, falls and postural defects, he was initially treated with Sodium Valproate, Benzodiazepine and Antispasmodics. Then the child was put on IVIG for 2 day at a dose of 2 g/kg. However, the child could not tolerate the drug and exhibited Cyclical Vomiting. In view of poor financial status, the parents owed for DAMA (Discharge Against Medical Advise). He was discharged with Cap. Ribavirin 200 mg TDS for 2 weeks, Tab. Sodium Valproate 200 mg 2-0-2 for 2 weeks, Tab. Risperidone 0.5 mg BD for 2 weeks, Laxatives and Proton pump inhibitors. The child was followed up in OPD basis and had 4-5 OPD visits. However, the diseases progressed and exhibited worsening akinesis.

After 6 months of first episode, he was readmitted. This time the child was totally bed ridden, not interacting with his mother, mutism +, persistent upward gaze +, choreiform movements +, perioral dyskinesias +, bilateral tremors + and had cog wheel rigidity in limbs. Now the child was given IVIG 1 g/kg over 4 days. Child had 1 episode of seizure during hospitalization for which oral Valproate was changed to IV form. Since his oral intake was poor, Ryles tube feed was initiated. His parents were counseled regarding the progressive nature of illness. In view of multiple numbers of oral lesions, Ribavirin was stopped and treated with Inj. Betamethasone for 2 days. Upon discharge he was given Syr. Valproate, Oral Steroid (Prednisolone) tapering therapy, THP 2 mg BD, PPI and Laxatives. Parents were advised to maintain RT feed of 150 mL, once in 3 hours. After 1 week, he succumbed to his illness at his residence.

Discussion

SSPE is a long standing/ chronic progressive neurodegenerative disease caused by latent measles virus. This might occur 2 – 10 years following primary infection. Acute measles encephalitis, measles inclusion body encephalitis are some of the neurological complications following a measles infection. 5 Myoclonus seizure (generalized/ focal), cognitive impairment, EPS, visual defects are common manifestations of SSPE. Early rare symptoms of SSPE includes transcortical sensory aphasia, hemiparesis, cortical blindness, optic neuritis, aphasia, choreoathetoid movements. 6

There are some anecdotal case reports which describes a relation between Pseudotumour Cerebri and SSPE. Pseudotumour Cerebri is a condition characterized by elevation in ICP without an underlying lesion or any other cause. However, the exact mechanism for the elevation in ICP in SSPE is unclear; it might be due to acute inflammatory reaction. A case study reported that most patients with SSPE who had an elevated ICP remained asymptomatic. 7, 8, 9 In the present case, the child had a history of fatigueness, mild head ache, aggressiveness/ anger, myoclonus jerks, cognitive and intellectual defects. Also, on examination it was understood that the child also had partial rise in ICP, with marked papilloedema without any intracranial mass/ lesion. Here, the child had a presence of highly positive measles titer in the CSF, Electro-encephalogram (EEG) analysis revealed stereotyped polymorphic discharge seen periodically, suggestive of SSPE. 10 The presenting symptoms of SSPE are often confusing. SSPE might mimic acute encephalitis. 11

Conclusion

Our case paves a path to uplift the need coverage of measles vaccination. The vaccination to measles remains at base and 50% of death occurs, associated with deaths in India. Our case study highlights that SSPE can be presented as acute encephalitis at the primary sight. Hence it is important to rule out the differential diagnosis of SSPE by taking into consideration about neuroimging, CSF study, anti- measles antibody.

Conflicts of Interest

None.

Source of Funding

None.

References

1 

JL Jameson AS Fauci DL Kasper SL Hauser DL Longo J Loscalzo Harrison’s Principles of Internal Medicine, 20th edn.McGraw Hill EducationUSA2018

2 

C Singer A E Lang O Suchowersky Adult-onset subacute sclerosing panencephalitis: case reports and review of the literatureMov Disord19971233425310.1002/mds.870120313

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J Gutierrez R S Issacson B S Koppel Subacute sclerosing panencephalitis: an updateDev Med Child Neurol20105210901710.1111/j.1469-8749.2010.03717.x

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V Sardana D Sharma S Agrawal Subacute sclerosing panencephalitis revisitedInt J Basic Appl Med Sci2013322541

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E Tan I J Namer A Ciger T Zileli T Kucukali The prognosis of subacute sclerosing panencephalitis in adults: report of 8 cases and review of the literatureClin Neurol Neurosurg1991933205910.1016/s0303-8467(05)80004-6

6 

S Praveen-Kumar S Sinha AB Taly Electroencephalographic and imaging profile in a subacute sclerosing panencephalitis (SSPE) cohort: a correlative studyClin Neurophysiol2007118919475410.1016/j.clinph.2007.06.008

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J Goraya H Marks D Khurana Sub acute sclerosing pan encephalitis (SSPE) presenting as acute disseminated encephalomyelitis in a childJ Child Neurol200924789990310.1177/0883073808330184

8 

L Kan S K Sood J Maytal Pseudotumor cerebri in Lyme disease: a case report and literature reviewPediatr Neurol19981854394110.1016/s0887-8994(97)00215-4

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E Lahat M Leskem A Barzilai Pseudotumor cerebri complicating varicella in a childActa Paediatr199887121310110.1080/080352598750031059

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A Ayçiçek A Işcan H Ceçe Pseudotumor cerebri secondary to subacute sclerosing panencephalitisPediatr Neurol2009405371610.1016/j.pediatrneurol.2008.12.003

11 

RK Garg HS Malhotra I Rizvi N Kumar A Jain An unusual case of acute encephalitic syndrome: is it acute measles encephalitis or subacute sclerosing panencephalitis?Neurol India201765613334410.4103/0028-3886.217942



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Article type

Case Report


Article page

69-71


Authors Details

Athira Mohan S*, Anoop V Somarajan, Dhanya Dharman


Article History

Received : 31-12-2022

Accepted : 25-06-2023


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