1.Neurological melioidosis in East Malaysia: Case series and review of the literature
Si Lei Fong ; Jin ShyanWong ; Ai Huey Tan ; Soon Chai Low ; Chong Tin Tan
Neurology Asia 2017;22(1):25-32
Melioidosis is an infectious disease caused by an aerobic, non-spore forming gram negative bacillus,
Burkholderia pseudomallei. It is known to be of high incidence in parts of rural South East Asia,
and in Northern Australia. Pneumonia is the commonest manifestation. We report here three cases of
neurological melioidosis from the registry of 169 cases of melioidosis in Bintulu Hospital, Sarawak,
East Malaysia, with a review of neurological melioidosis in the literature. The annual incidence of
melioidosis is estimated to be 8 per 100,000 populations in the Bintulu district. Neurological melioidosis
accounts for 1.8% of our melioidosis cases. A review of 76 cases of neurological melioidosis reported
in the literature inclusive of our 3 cases shows that localized brain or spinal inflammation or abscess
is the most common manifestation occurring in 80% of patients. Close to half (53%) have intra axial
abscess (brain or spinal cord), a quarter (27%) have extra axial lesions only (epidural or subdural
collection, osteomyelitis or scalp abscess), and another quarter (27%) have both intra and extra axial
lesions. Thus, B. pseudomallei appears to be unique among the bacterial central nervous system
infection to be able to affect the brain and its contiguous tissues, crossing the tissue plane particularly
resulting in osteomyelitis, scalp abscess and vice versa. Two thirds of the neurologicalmelioidosis
patients have only neurological disease with no evidence of disease elsewhere.
Key words: Burkholderia pseudomallei; neurological melioidosis; Bintulu; Sarawak; Malaysia
Melioidosis
2.Hyperglycemia-Associated Hemichorea-Hemiballismus with Predominant Ipsilateral Putaminal Abnormality on Neuroimaging
Si Lei FONG ; Ai Huey TAN ; Kar Foo LAU ; Norlisah RAMLI ; Shen Yang LIM
Journal of Movement Disorders 2019;12(3):187-189
No abstract available.
Neuroimaging
3.Chorea in Sporadic Creutzfeldt-Jakob Disease
Ai Huey TAN ; Tsun Haw TOH ; Soon Chai LOW ; Si Lei FONG ; Kah Kian CHONG ; Kee Wei LEE ; Khean Jin GOH ; Shen Yang LIM
Journal of Movement Disorders 2018;11(3):149-151
No abstract available.
Chorea
;
Creutzfeldt-Jakob Syndrome
4.How many more seizure remission can we achieve with epilepsy surgeries in a general epilepsy population?
Si-Lei Fong ; Kheng-Seang Lim ; Khine Yee Mon ; Sherrini Ahmad Bazir ; ChongTin Tan
Neurology Asia 2020;25(4):467-472
Background & Objective: We knew that 63.6% of the epilepsy population can be seizure free with
the use of anti-epileptic drugs (AED), but are unsure how many more with epilepsy surgeries. We
aimed to determine the additional remission rate achieved with epilepsy surgeries in addition to AED.
Methods: We analysed the seizure outcome among epilepsy patients seen retrospectively over oneyear period in University Malaya Medical Centre, Malaysia, which provides all levels (level 1-4) of
epilepsy cares, in response to anti-epileptic drug (AED) and epilepsy surgeries. The seizure outcome
was categorised into remission and drug-resistant, according to ILAE definition of drug resistance.
Results: There were 909 patients seen during the study period, majority with focal epilepsy (63.3%),
and Chinese (37.4%). Of those, 409 (45.0%) were in seizure remission, 238 (26.2%) had drug-resistant epilepsy and 262 (28.8%) uncertain. Only the remission and drug-resistant groups (N=647) were included in subsequent analysis. The mean age of onset in drug-resistant group was 14.8±12.3 years old, which was significantly younger than the remission group (20.8±16.8, p<0.05). There were 40 (54.8%) patients who underwent resective epilepsy surgeries (10 were lesion-negative cases). The
seizure freedom rate with epilepsy surgery was 60.0% (n=24). Overall, a total of 59.5% of patients
were in seizure remission with AED, with an additional 3.7% with epilepsy surgery.
Conclusion: There were 3.7% of epilepsy patients achieved seizure remission with epilepsy surgeries
in a general epilepsy cohort in addition to AEDs.
5.Epilepsy in Southeast Asia, how much have we closed the management gap in past two decades?
Kheng-Seang Lim ; Zhi-Jien Chia ; Moe-Zaw Myint ; Kazi Jannat Ara ; Yong-Chuan Chee ; Woon-Theng Heng ; Thanmidraaj-Kaur Balraj Singh ; Janice-Ying-Qian Ong ; Slocahnah SreeKumar ; Minh-An Thuy Lee ; Si-Lei Fong ; Chong-Tin Tan
Neurology Asia 2020;25(4):425-438
The last review on epilepsy in Southeast Asian (SEA) countries was reported in 1997. This review
aimed to update the understanding of epilepsy management in this region over the past 23 years. There
has been significant increase in the epidemiological studies which reported a prevalence of 4.3-7.7 per
1,000 populations in this region. Reversible aetiologies of epilepsy such as head injury, birth trauma,
cerebrovascular disease, and intracranial infections (neurocysticercosis or meningoencephalitis) are
still prevalent, with a surge in autoimmune encephalitis. There was a surge in genetic studies which
suggest ethnic variation. Treatment gap is still high especially in the rural and less developed areas,
and the availability and affordability of newer anti-epileptic drugs (AEDs) is still a major challenge
in SEA. Alternative medicine is a common practice but varies among different ethnic groups. AEDs
hypersensitivity especially on the association between HLA-B*1502 and carbamazepine-related severe
cutaneous reaction had been extensively studied and proven in nearly all SEA countries. However,
HLA-B*1502 screening is not widely available in SEA and the cost-effectiveness of the screening is
questionable. Stigma and its psychosocial consequences are still a major concern despite enormous
efforts to study the public attitudes towards epilepsy and change of epilepsy naming in a few countries.
The number and complexity of epilepsy surgery are progressing, but it is still under-utilized in many
SEA countries, related to cost, cultural perception and lack of facilities. More resources should also
be channelled in training adequate number of epileptologists who can spearhead epilepsy care around
the region, as well as public education and research in epilepsy. In conclusion, there is an increase in
epilepsy research in this region, gradual increase in trained neurologists and facilities, and efforts to
reduce the knowledge and treatment gap, but the epilepsy management gap is still a battle to fight.