PubMed query for “Parkinson disease” yields more than 2,000 articles per year for each of the last 5 years. That is a daunting pile of bedside reading for even the most diligent neurologist. This review highlights 5 emerging topics that are changing our current understanding and management of Parkinson disease (PD). When using the term PD, we mean Lewy body parkinsonism as defined by the clinical criteria of the United Kingdom Parkinson's Disease Society Brain Bank. Other parkinsonian syndromes, such as progressive supranuclear palsy and multiple system atrophy, are beyond the scope of this review (Full text).