1.Cerebral venous thrombosis in multi-ethnic patients from Malaysia
Mei-Ling Sharon TAI ; Khairul Azmi Abdul KADIR ; Chong Tin TAN ; Kay Sin TAN
Neurology Asia 2020;25(2):127-138
Background & Objectives: The literature on cerebral venous thrombosis (CVT) in South East Asia is
limited. The objectives were to evaluate the clinical profile, predisposing factors and clinical outcome
of the CVT patients in Malaysia. Methods: We conducted a retrospective descriptive study of the CVT
patients admitted to the neurology ward. The clinical presentation, predisposing factors, radiological
findings, treatment and prognostic characteristics were evaluated from the charts. Clinical outcome
on discharge and six months was measured by Modified Rankin Scale (mRS) scores. Poor outcome
and good outcome was defined as Modified Rankin Scale (mRS) scores of 3-6 and 0-2 respectively.
Results: Forty nine CVT patients who presented between 2007 and 2017 were recruited. The mean age
was 43.51±16.52. The patients consisted of 39 Malaysians (13 Indians, 12 Malays, 12 Chinese, one
Iban, one Eurasian descent), and ten non-Malaysians. Thirty (61.2%) patients were women. The most
common presenting complaint was headache (75.5%). Six percent had multiple risk factors, whereas
51% had idiopathic CVT. The most common predisposing factors were oral contraceptive pill use
(18.4%), followed by infection (12.2%), especially central nervous system (CNS) infection (6.1%);
11.8% had prothrombotic disorder. The most common location for CVT was superior sagittal sinus
(83.7%). On neuroimaging, 77.6% had parenchymal lesions, 53.1% had venous infarcts and 38.8% had intracerebral haemorrhage, one patient had CVT complicated by rare venous collateral channels. Poor outcome on discharge and at six months was 38.8% and 33.3% respectively. On univariate analysis, female gender (p=0.002), seizures (p=0.037) and cerebral oedema (p=0.018) were associated with poor functional outcome. On binary logistic regression, female gender (OR=14.50, 95% CI 2.10-99.94,p=0.003) and seizures (OR=6.54, 95% CI 1.33-32.07, p=0.017) were associated with poor outcome.
Conclusion: The CVT patients in this study had a higher proportion of CNS infections. Poor outcome
was independently associated with female gender and seizures.
2.Complementary and alternative medicine for migraine and tension-type headache among the Malaysians
Mei-Ling Sharon TAI ; Jun Fai YAP ; Han Lim CHIN ; Chong Tin TAN ; Cheng Beh GOH
Neurology Asia 2020;25(2):153-163
Background: The literature on complementary and alternative (CAM) therapies in South East Asia
is limited. The objective of the study was to evaluate the frequencies of CAM therapies in the
Malaysian patients with migraine and tension-type headache (TTH). We also assessed the reasons for
CAM use. Methods: This was a cross-sectional study. The study was conducted in a tertiary hospital
in Malaysia. Consecutive patients presenting with migraine and TTH to the neurology clinic were
recruited. Demographic characteristics were documented. Data on CAM use, including frequency and
the reasons was collected. Results: Six hundred and eighty five patients (365 TTH and 320 migraine)
were recruited. They consisted of 305 (44.5%) Malay, 174 (25.4%) Chinese, 169 (24.7%) Indian
and 37 (5.4%) patients from other ethnic groups. A total of 478 (69.8%) patients, comprising 266
(55.6%) patients with TTH and 212 (44.4%) patients with migraine used CAM therapies. The most
commonly used CAM therapies were medicated oil (355 patients, 51.8%) and massage (246 patients,
35.9%). The most common reasons for CAM use were reduction of pain (47.7 %), stress reduction
(34.9%), and “cooling” effect (27.4%). Thirteen (4.1%) patients with migraine practiced reflexology,
whereas 5 (1.4%) patients with TTH practiced reflexology (p=0.032). Twenty three (7.2%) patients
with migraine took vitamin supplements compared to 13 (3.6%) patients with TTH (p=0.039). On
univariate analysis, CAM use was significantly associated with ethnic groups (p=0.014), gender
(p<0.0001), age (p=0.004), salary (p=0.014), educational level (p=0.003), and headache subtypes
(p= 0.067). On logistic regression, married women were more likely to use CAM (OR=1.864, 95%
CI 1.216-2.858, p=0.004).
Conclusion: A large number of Malaysian headache patients used CAM. The most common reasons
were reduction of pain, stress and “heatiness”. Medicated oil was most commonly used, followed by
massage. Married women were more likely to use CAM, and this was the only determinant in this study.
3.Disseminated Takayasu arteritis with neurovascular small and medium vessel involvement
Peng L ; Kartini Rahmat ; Khairul Azmi Abdul Kadir ; Kheng-Seang Lim ; Fariz Yahya ; Mei-Ling Sharon Tai
Neurology Asia 2019;24(1):53-59
Takayasu arteritis is a rare granulomatous vasculitis that is commonly classified as a large vessel
disease. Small and medium vessel involvement are extremely rare, with only a few case reports
describing neurovascular, ocular and cutaneous involvement. We describe a 21 year old Malaysian
woman with pre-existing Takayasu arteritis confined to the large vessels, presenting one year later
to our centre with status epilepticus. Extensive radiologic studies revealed diffuse encephalopathic
changes and multifocal neurovascular involvement, with the vasculitis progressing to encompass
the large, medium and small vessels. The patient was treated with high dose steroid therapy and
discharged well with long term steroid and immunosuppressive therapy. Follow up MRI with vessel
wall imaging sequence (VW-MR) and arterial spin labelling (ASL) perfusion imaging demonstrated
intra and extracranial vessel wall inflammation, with generalized reduction in left sided cerebral blood
flow. This case demonstrates that Takayasu arteritis is not exclusively a large vessel vasculitis, and
that small and medium vessel involvement does not preclude its diagnosis.
4.Predictors of functional outcome in patients with stroke thrombolysis in a tertiary hospital in Malaysia.
Mei-Ling Sharon TAI ; Khean Jin GOH ; Khairul Azmi Abdul KADIR ; Mohd Idzwan ZAKARIA ; Jun Fai YAP ; Kay Sin TAN
Singapore medical journal 2019;60(5):236-240
INTRODUCTION:
Intravenous (IV) thrombolysis with alteplase (rt-PA) is effective in ischaemic stroke. The primary objective was to evaluate predictors of functional outcome in acute ischaemic stroke (AIS) patients treated with IV rt-PA. The secondary objective was to assess the outcome with the modified Rankin scale (mRS). We also examined the predictive value of the Totaled Health Risks in Vascular Events (THRIVE) score.
METHODS:
AIS patients treated with IV rt-PA from February 2012 to August 2016 were recruited. Demographic data, National Institutes of Health Stroke Scale (NIHSS) scores, timing and neuroradiological findings were recorded. Patients received a dose of 0.9 mg/kg IV rt-PA within 4.5 hours of symptom onset. mRS score was evaluated at discharge and three months, and good and poor clinical outcomes were defined as scores of 0-2 and 3-6, respectively. Baseline THRIVE scores were assessed.
RESULTS:
36 patients received IV rt-PA. 20 (55.6%) patients had an mRS score of 0-2 at three months. Based on THRIVE score, 86.1% had a good or moderately good prognosis. On univariate analysis, poor outcome was associated with NIHSS score before rt-PA (p = 0.03), THRIVE score (p = 0.02), stroke subtype (p = 0.049) and diabetes mellitus (DM; p = 0.06). Multiple logistic regression showed that outcome was significantly associated with NIHSS score before rt-PA (p = 0.032) and DM (p = 0.010).
CONCLUSION
Our newly developed Malaysian IV rt-PA service is safe, with similar outcomes to the published literature. Functional outcome after thrombolysis was associated with baseline NIHSS score and DM.
5.Moyamoya disease in a young woman with intraand extracranial vessels involvement on vessel wall imaging
TOH Tsun-Haw ; Kay-Sin TAN ; Norlisah RAMLI ; Kartini RAHMAT ; Chong-Tin TAN ; Kar-Foo LAU ; Mei-Ling Sharon TAI
Neurology Asia 2019;24(3):281-285
Moyamoya disease (MMD) was first described
in 1957 as “bilateral hypoplasia of internal
carotid arteries (ICAs)”.1
Aside from involving the intracranial arteries, MMD can also affect
extracranial ICAs and external carotid arteries
(ECAs).2-4 High resolution magnetic resonance
(MR) vessel wall imaging (VWI) is increasingly
being used to help with the diagnosis and
characterization of the condition focusing mainly
on intracranial vessels and extracranial ICAs.5-9
We present a case of a young woman with MMD,
demonstrating vessel wall enhancement of nonstenotic maxillary branches of bilateral ECAs.
6.Tuberculous optochiasmatic arachnoiditis and optochiasmatic tuberculoma in Malaysia
Mei-Ling Sharon TAI ; Shanthi VISWANATHAN ; Kartini RAHMAT ; Heng Thay CHONG ; Wan Zhen GOH ; Esther Kar Mun YEOW ; Tsun Haw TOH ; Chong Tin TAN
Neurology Asia 2018;23(4):319-326
Background & Objectives: Arachnoiditis which involves the optic chiasm and optic nervecan rarely
occurs in the patients with tuberculous meningitis (TBM). The primary objective of this study was to
determine the incidence, assess the clinical and neuroimaging findings, and associations, understand
its pathogenesis of these patients, and determine its prognosis. Methods: The patients admitted with
TBM in the neurology wards of two tertiary care hospitals from 2009 to 2017 in Kuala Lumpur,
Malaysia were screened. The patients with OCA and optochiasmatic tuberculoma were included in
this study. We assessed the clinical, cerebrospinal fluid (CSF), imaging findings of the study subjects
and compared with other patients without OCA or optochiasmatic tuberculoma. Results: Eighty-eight
patients with TBM were seen during the study period. Seven (8.0%) had OCA and one (1.1%) had
optochiasmatic tuberculoma. Five out of seven (71.4%) patients with OCA were newly diagnosed cases
of TBM. The other two (28.6%) had involvement while on treatment with antituberculous treatment
(paradoxical manifestation). The mean age of the patients with OCA was 27.3 ± 11.7. All the OCA
patients had leptomeningeal enhancement at other sites. All had hydrocephalus and cerebral infarcts
on brain neuroimaging. Three (42.9%) patients had cerebral tuberculoma at sites other than suprasellar
and optic chiasm areas. On univariate analysis, the presence of OCA and optochiasmatic tuberculoma
was associated with raised CSF opening pressure (p=0.014), younger age (p=0.024), cerebral infarcts
(p=0.018) and hydrocephalus (p= 0.046). There was no statistically significant association on logistic
regression. Only one (14.3%) patient had visual impairment.
Conclusion: OCA and optochiasmatic tuberculoma were seen in 9% of a cohort of Malaysian TBM
patients. They were more likely to be younger, have raised CSF opening pressure, cerebral infarcts
and hydrocephalus, suggesting the association with a more severe exudative disease.
7.Spinal tuberculous disease is common in tuberculous meningitis
Mei-Ling Sharon TAI ; Hazman Mohd NOR ; Shanthi VISWANATHAN ; Kartini RAHMAT ; Norzaini Rose Mohd Zain ; Zhen Yuan POW ; Lay Sim ONG ; Mohd Hanip RAFIA ; Chong Tin TAN
Neurology Asia 2017;22(4):313-323
Background: Tuberculous disease of spine (spinal TB) is under-recognized in tuberculous (TB) meningitis.The objective of the study was to evaluate the frequency, clinical and neuroimaging changes, andoutcome in the patients with spinal TB. Methods: All the patients with spinal TB admitted in the twolargest tertiary hospitals in Kuala Lumpur from 2009 to 2017 were recruited, the clinical features weredocumented, the magnetic resonance imaging (MRI) of the spine was performed. Clinical outcome wasassessed with Modified Rankin scale (MRS). Results: Twenty two patients were recruited. This wasout of 70 TB meningitis patients (31.4%) seen over the same period. Eighteen (81.8%) patients hadconcomitant TB meningitis. The clinical features consisted of systemic symptoms with fever (63.6%),meningitis symptoms with altered sensorium (45.5%), myelopathy with paraparesis (36.4%). Thefindings on spinal MRI were discitis (36.4%), spinal meningeal enhancement (31.8%), spinal cordcompression (31.8%), psoas abscess (27.3%), osteomyelitis (22.7%), and cord oedema (22.7%). Allexcept two patients (90.9%) had involvement in psoas muscle, bone or leptomeningeal enhancement,features that can be used to differentiate from myelopathy that affect the parenchyma only, such asdemyelination. Unusual manifestations were syringomyelia and paradoxical manifestations seen in 3patients each. The outcome were overall poor, with 68% having MRS 3 or more.Conclusion: Spinal TB is common in TB meningitis. The outcome is overall poor. A heightenedawareness is crucial to enable early diagnosis and treatment.
8.Role of cytokines in the assessment of clinical outcome and neuroimaging findings in patients with tuberculous meningitis
Mei-Ling Sharon Tai ; Hong-Yien Tan ; Yean-Kong Yong ; Esaki M. Shankar ; Shanthi Viswanathan ; Hazman Mohd Nor ; Kartini Rahmat ; Jun-Fai Yap ; Boon-Seng Ng ; Chong Tin Tan
Neurology Asia 2017;22(3):209-220
Background: Tuberculous meningitis is a life-threatening manifestation resulting from infection
by Mycobacterium tuberculosis, especially in the developing countries. The molecular aspects of
pathogenesis of tuberculous meningitis remain poorly understood. We evaluated the correlation of
cerebrospinal fluid (CSF) and serum cytokine levels with the clinical outcome of 15 HIV-negative
patients with tuberculous meningitis. We also assessed the association of CSF and serum cytokines
with neuroimaging of brain findings in the patients. Methods: The prospective longitudinal study was
conducted at the University Malaya Medical Centre between 2012 and 2014. Neuroimaging of the
brain was performed and the findings of leptomeningeal enhancement, hydrocephalus, tuberculoma,
infarcts and vasculopathy were recorded. The CSF and serum specimens were analyzed for IL-1ß,
IL-8, IL-10, IL-18, IP-10, IFN-γ, MCP-1, TGF-ß, VEGF, TNF- α, IL-18BPa and MMP-9. The clinical
outcome was graded at 3 months based on Modified Rankin scale (mRS). Results: On admission and
at one month of anti-tuberculosis treatment, the CSF levels of IL-8, IL-1β, IP-10, IFN-γ and VEGF
were elevated in all of the patients. Serum IP-10, MCP-1, IL-1β and IL-8 levels were increased on
admission and at one month of anti-tuberculosis treatment. There were statistically significant differences
between good and poor outcome (mRS at 3 months) for CSF IFN-γ (p=0.033), CSF IL-10 (p=0.033)
and serum VEGF (p=0.033) at one month of treatment. None of the patients showed any association
between CSF and serum cytokines on admission and at one month of anti-tuberculosis treatment with
neuro-radiological findings.
Conclusion: The CSF cytokine levels were not related to TBM disease severity on admission, and
changes on MRI/CT scans. CSF levels of IFN-γ and IL-10 at one month of anti-tuberculosis treatment
were associated with clinical outcome at 3 months. CSF cytokine levels on admission were not
associated with the clinical outcome.
Tuberculosis, Meningeal
9.Neuroimaging findings are sensitive and specific in diagnosis of tuberculous meningitis
Mei-Ling Sharon Tai ; Hazman Mohd Nor ; Kartini Rahmat ; Shanthi Viswanathan ; Khairul Azmi Abdul Kadir ; Norlisah Ramli ; Fatimah Kamila Abu Bakar ; Norzaini Rose Mohd Zain ; Suhailah Abdullah ; Jun Fai Yap ; Ahmed Shaheed ; Boon Seng Ng ; Mohd Hanip Rafia ; Chong Tin Tan
Neurology Asia 2017;22(1):15-23
Objective: The primary objective of this study was to describe the neuroimaging changes of tuberculous
meningitis (TBM), and to determine the role of neuroimaging in the diagnosis of TBM. Methods:
Between January 2009 and July 2015, we prospectively recruited TBM patients in two hospitals in
Malaysia. Neuroimaging was performed and findings were recorded. The control consists of other types
of meningo-encephalitis seen over the same period. Results: Fifty four TBM patients were recruited.
Leptomeningeal enhancement was seen in 39 (72.2%) patients, commonly at prepontine cistern and
interpeduncular fossa. Hydrocephalus was observed in 38 (70.4%) patients, 25 (46.3%) patients had
moderate and severe hydrocephalus. Thirty four patients (63.0%) had cerebral infarction. Tuberculoma
were seen in 29 (53.7%) patients; 27 (50.0%) patients had classical tuberculoma, 2 (3.7%) patients
had “other” type of tuberculoma, 18 (33.3%) patients had ≥5 tuberculoma, and 11 (20.4%) patients
had < 5 tuberculoma. Fifteen (37.2%) patients had vasculitis, 6 (11.1%) patients had vasospasm. Close
to nine tenth (88.9%) of the patients had ≥1 classical neuroimaging features, 77.8% had ≥ 2 classical
imaging features of TBM (basal enhancement, hydrocephalus, basal ganglia / thalamic infarct, classical
tuberculoma, and vasculitis/vasospasm). Only 4% with other types of meningitis/encephalitis had ≥1
feature, and 1% had two or more classical TBM neuroimaging features. The sensitivity of the imaging
features of the imaging features for diagnosis of TBM was 88.9% and the specificity was 95.6%.
Conclusion: The classic imaging features of basal enhancement, hydrocephalus, basal ganglia/thalamic
infarct, classic tuberculoma, and vasculitis are sensitive and specific to diagnosis of TBM.
Tuberculosis, Meningeal
10.Recurrent cerebral infarcts secondary to marantic endocarditis in a patient with adenocarcinoma of the lung.
Mei-Ling Sharon TAI ; Eugene Choon Li TAN ; Choon Chin ANG ; Chong-Kin LIAM
Singapore medical journal 2016;57(9):524-525
Adenocarcinoma
;
complications
;
Aged
;
Cerebral Infarction
;
complications
;
Echocardiography, Transesophageal
;
Endocarditis
;
complications
;
Endocarditis, Non-Infective
;
complications
;
Fatal Outcome
;
Female
;
Humans
;
Lung Neoplasms
;
complications
;
Mutation
;
Receptor, Epidermal Growth Factor
;
metabolism
;
Recurrence


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