Several community-based surveys on the prevalence of Parkinsonism and Parkinson's disease have been conducted worldwide, with variations on their methodology and results. The objective of this study is to assess the prevalence of Parkinsonism and its causes in a cohort of individuals age 64 years or older in Bambuí, a Brazilian town. In phase I, 1,186 people older than 64 years responded to a 9-question screening questionnaire for Parkinsonism. In phase II, all subjects who scored > or = 2 points on the test were examined independently by at least 2 movement disorder-trained physicians. A movement disorder senior specialist excluded or confirmed the diagnosis in all suspected cases. The response rate was high for both phases (96% for phase I and 94% for phase II). The prevalence rate per 100 population over 64 years of age in this group was 7.2% for Parkinsonism of all types (n = 86). The most frequent causes were idiopathic Parkinson's disease and drug-induced Parkinsonism, with prevalence rates of 3.3% (n = 39) and 2.7% (n = 32), respectively. The prevalence of vascular Parkinsonism was 1.1% (n = 13). We found 1 case of posttraumatic Parkinsonism and another with multiple system atrophy. In this first population-based study of Parkinsonism conducted in Brazil, the prevalence in a cohort of elderly subjects was higher than the observed in other populations worldwide, especially because of the high rates of drug-induced and vascular Parkinsonism. The prevalence of Parkinson's disease was similar to that observed in elderly people in door-to-door surveys in other American, European, and Eastern countries.

The authors investigated obsessive-compulsive behavior, obsessive-compulsive disorder (OCD), and attention deficit and hyperactivity disorder (ADHD) in 50 healthy subjects, 50 patients with rheumatic fever without chorea, and 56 patients with Sydenham chorea. Obsessive-compulsive behavior, OCD, and ADHD were more frequent in the Sydenham chorea group (19%, 23.2%, 30.4%) than in the healthy subjects (11%, 4%, 8%) and in the rheumatic fever without chorea group (14%, 6%, 8%). ADHD was more common in persistent Sydenham chorea.

Despite the renewed interest in Sydenham's chorea (SC) in recent years, there were no valid and reliable scales to rate the several signs and symptoms of patients with SC and related disorders. The Universidade Federal de Minas Gerais (UFMG) Sydenham's Chorea Rating Scale (USCRS) was designed to provide a detailed quantitative description of the performance of activities of daily living, behavioral abnormalities, and motor function of subjects with SC. The scale comprises 27 items and each one is scored from 0 (no symptom or sign) to 4 (severe disability or finding). Data from 84 subjects, aged 4.9 to 33.6 years, support the interrater reliability and internal consistency of the scale. The USCRS is a promising instrument for rating the clinical features of SC as well as their functional impact in children and adults.

-We report a 67-year-old man with Parkinson's disease for 9 years who developed compulsive use of levodopa. This phenomenon is the main feature of the dopamine dysregulation syndrome. Other related symptoms presented by our patient were mood fluctuation and increased writing activity suggestive of punding.KEY WORDS: Parkinson's disease, dopamine dysregulation syndrome, punding.Síndrome de desregulação dopaminérgica na doença de Parkinson: relato de caso RESUMO -Relatamos sobre um homem de 67 anos de idade com doença de Parkinson por 9 anos e que desenvolveu uso compulsivo de levodopa. Esse fenômeno é a principal característica da síndrome de desregulação dopaminérgica. Outros sintomas apresentados pelo paciente foram flutuações do humor e atividade de escrita aumentada, comportamento este sugestivo de punding. PALAVRAS-CHAVE: doença de Parkinson, síndrome de desregulação dopaminérgica, punding.Parkinson's disease (PD) is associated with a prog ressive dysfunction of the dopaminergic neuro t r a n smission in the basal ganglia. On pathological examination, the dopaminergic neurons in the pars compacta of the substantia nigra a re markedly re d u c e d , and cytoplasmic proteinaceous aggregates known as Lewy bodies are present in the residual neurons. Dopamine replacement therapy (DRT), with the dopamine precursor levodopa or synthetic dopamine agonists, is considered the mainstem of the pharm a c ological approach for the symptoms of PD 1 , 2 . However long-term DRT is commonly associated with a series of motor complications, such as dyskinesias and the o n -o ff phenomenon. More re c e n t l y, interest has been drawn to non-motor complications of PD and treatm e n t -related psychiatric symptoms, such as depre ssive disorders, fatigue, apathy and cognitive impairment 3 . We describe a man with PD since 58 year-old who developed compulsive use of levodopa. In off periods he presented severe non-motor symptoms, including craving for levodopa, intense feelings of dysphoria, worsening of depressive symptoms, painful tru n k sensations and profuse sweating. During peak dose period, he also became hypomanic and had diff i c u lty in perceiving his severe dyskinesias. This behavior has been recently described in literature as a quite r a renon-motor complication of DRT. This syndro m e of increased use of levodopa beyond that needed to achieve relief of motor symptoms, associated with disabling mood and behavioral features is re f e rre d by some authors as dopamine dysregulation syndrome ( D D S ) 4 , 5 . To the best of our knowledge, this is the first case of this syndrome re p o rted in the Brazilian l i t e r a t u re. The patient gave informed consent for this case report. CASEA 67-year-old man, married, a retired surgeon had PD for 9 years. He had no previous history of alcohol or any