-Patients with Parkinson's disease (PD) in whom symptoms start before the age of 45 years (EOPD) present different clinical characteristics from those with the late-onset form of the disease. The incidence of depression is believed to be greater in patients with EOPD than with the late-onset form of the disease, although there is no risk factor or marker for depression in patients with PD. We studied 45 patients with EOPD to define the frequency of depression and to identify possible differences between the groups with and without depression. Depression was diagnosed in 16 (35.5%) of the patients, a higher incidence than in the population at large but similar to the figure for late-onset Parkinson disease; 8 (50%) of the patients had mild depression, 4 (25%) moderate depression and 4 (25%) were in remission. There was no relationship between depression and any of the clinical characteristics of the disease, although the EOPD patients with depression presented earlier levodopa-related complications and were more affected on the Hoehn-Yahr, UPDRS and Schwab-England scales.KEY WORDS: Parkinson's disease, early-onset Parkinson's disease, depression. Doença de Parkinson de início precoce e depressãoRESUMO -Os pacientes com doença de Parkinson (DP) cujo início dos sintomas ocorre até os 45 anos (DPIP), apresentam características clínicas que a diferem da doença de início tardio. Estudos têm sugerido que pacientes com DPIP têm maior incidência de depressão quando comparados aos de início tardio, mas sem definição de algum marcador específico da doença para depressão. Estudamos 45 pacientes com DPIP, para definir a freqüência da depressão e verificar possíveis diferenças entre os grupos com e sem depressão. A depressão foi diagnosticada em 16 (35.5%) pacientes estando acima da média da população geral, porém semelhante aos índices relatados pelos estudos de pacientes com DP de início tardio; 8 (50%) pacientes tinham depressão leve, 4 (25%) moderada e 4 (25%) estavam em remissão.Não houve relação da depressão com nenhuma das características clínicas da doença, embora apresentem complicações mais precoces da levodopaterapia, e sejam mais afetados nas escalas de Hoehn-Yahr, UPDRS e Schwab-England. . The cut-off age defined by the majority of authors has traditionally been 40 years 3,4 , which is approximately two standard deviations below the average age of all patients 5 . There is a subgroup of these patients in whom symptoms start before the age of 21 years; this form of the disease is called juvenile-onset Parkinson's disease 4 . A number of recent studies, however, have shown genetic mutations in a large proportion of patients with EOPD, and a cut-off age of 45 6 or 50 7 years has been used. Although EOPD has been considered as the lower limit of the age range for presenting PD, differences in the clinical characteristics, progression of the disease, latency period for the appearance of levodopa-related complications and prognosis suggest that there are two subtypes of the disease 8-10 . The incidence of depr...

Objective Patients with Parkinson’s disease (PD) may present with unusual motor and non-motor symptoms and signs in the early stage of the disease. Methods Cases were collected over a five-year period at two tertiary movement disorders clinics. All had a diagnosis of PD with unusual presentations defined retrospectively as the presence of complaints not objectively related to any of the classic cardinal signs of parkinsonism or the typical early non-motor features of PD. Results A total of 15 early PD patients fulfilled the proposed criteria, presenting with symptoms such as atypical tremors, shoulder pain, signs related to the rigid akinetic syndrome, as well as cases of asthenia, rhinorrhea, parosmia, dysgeusia, nocturnal sialorrhea, and color discrimination disorders. Conclusions Unusual motor and non-motor symptoms and signs in the early stage of PD can be difficult to interpret. Specialists should be aware of these conditions as clues to a potential diagnosis.