Einstein (São Paulo)
Print version ISSN 1679-4508
BOR-SENG-SHU, Edson et al. Transcranial sonography in Parkinson's disease. Einstein (São Paulo) [online]. 2012, vol.10, n.2, pp. 242-246. ISSN 1679-4508. http://dx.doi.org/10.1590/S1679-45082012000200022.
Transcranial sonography has become a useful tool in the differential diagnosis of parkinsonian syndromes. This is a non-invasive, low cost procedure. The main finding on transcranial sonography in patients with idiopathic Parkinson's disease is an increased echogenicity of the mesencephalic substantia nigra region. This hyperechogenicity is present in more than 90% of cases, and reflects a dysfunction in the dopaminergic nigrostriatal pathway. This study discussed how the hyperechogenicity of the substantia nigra may facilitate the differential diagnosis of parkinsonian syndromes.
Keywords : Parkinson disease [ultrasonography]; Ultrasonography, doppler, transcranial; Diagnosis, differential.