The clinical diagnosis of neurodegenerative disorders based on phenotype is difficult in heterogeneous conditions with overlapping symptoms. It does not take into account the disease etiology or the highly variable clinical course even amongst patients diagnosed with the same disorder. The advent of next generation sequencing (NGS) has allowed for a system-wide, unbiased approach to identify all gene variants in the genome simultaneously. With the plethora of new genes being identified, genetic rather than phenotype-based classification of Mendelian diseases such as spinocerebellar ataxia (SCA), hereditary spastic paraplegia (HSP) and Charcot-Marie-Tooth disease (CMT) has become widely accepted. It has also become clear that gene variants play a role in common and predominantly sporadic neurodegenerative diseases such as Parkinson’s disease (PD) and amyotrophic lateral sclerosis (ALS). The observation of pleiotropy has emerged, with mutations in the same gene giving rise to diverse phenotypes, which further increases the complexity of phenotype-genotype correlation. Possible mechanisms of pleiotropy include different downstream effects of different mutations in the same gene, presence of modifier genes, and oligogenic inheritance. Future directions include development of bioinformatics tools and establishment of more extensive public genotype/phenotype databases to better distinguish deleterious gene variants from benign polymorphisms, translation of genetic findings into pathogenic mechanisms through in-vitro and in-vivo studies, and ultimately finding disease-modifying therapies for neurodegenerative disorders.

In March 2017, the International League Against Epilepsy (ILAE) announced their new classifications of seizures and epilepsies. Development of these classification systems led by the ILAE is a long and complicated process. Outsiders may find it difficult to understand the arguments behind. We summarize the major developmental milestones of the ILAE classification schemata. An update of the latest classification is also included. It is hope that this review can serve as an outline in learning the taxonomy in epileptology.

A territory-wide retrospective observational study was conducted in Hong Kong between January 23 to April 22, 2020 to demonstrate changes in pediatric seizure-related accident and emergency department (A&E) visits during the COVID-19 pandemic. Parallel periods from 2015 to 2019 were used as control. All-cause A&E attendances in all paediatric age groups decreased significantly during the study period. Seizure-related attendances decreased across all pediatric age-groups in 2020 (RR 0.379, 95% CI 0.245–0.588), with a disproportionately large decrease in the 0–6 years age group (RR 0.303, 95% CI 0.174–0.526) compared with the 7–18 years age group (RR 0.534, 95% CI 0.393–0.719). Decrease in RTI-related A&E attendances was also more drastic in the 0–6 age group. The two time trends are congruent in the 0–6 years but not the 7–18 years age group. Such a trend is suggestive of the usefulness of infection control measures in seizure prevention, especially amongst young children.

In neurology, many diseases are still incurable and have a fatal outcome. Palliative care (PC) definitely has a role in neurology. We discuss the screening criteria for PC referral, known as ‘triggers’ in different neurological diseases. Different clinical settings including in-patient and out-patient are covered. We hope this review can remind clinicians to involve PC in the appropriate patient group. Further clinical studies are expected to validate the triggers and trajectories of various neurological diseases.