1. Sir: The concept of vascular Parkinsonism is a controversial one. Critchley first introduced the concept in 1929 when he proposed that Parkinsonism due to vascular disease could be distinguished from idiopathic Parkinson's disease on the basis of clinical and pathologic criteria.' However, he did not present individual case data, either clinical or pathological, to demonstrate convincingly how to distinguish these two conditions or to exclude other recognised causes of Parkinsonism. Subsequently, other authors have questioned the existence of vascular Parkinsonism as a distinct entity, based on a lack of clinical,2 epidemiological34 and pathological56 evidence. Nevertheless, there are authorities who accept vascular Parkinsonism as a recognisable condition, generally associated with chronic hypertension and clinical evidence of multiple small lacunar infarctions.7
2. Cortical arteriovenous of histopathologic evidence, vascular Parfistula associated with skull fracture;LaHaye, P.A.; Lawner, P.M.,1984
3. Traumatic aneurysms. Adv Neurosurg diagnosis if the clinical criteria are met, and;Laun, A.,1978
4. Fistula between traumatic pseudoaneurysm of the middle meningeal artery and middle cerebral vein;Acta Neurologia (Napoli),1980
5. Traumatic intracranial This 37-year-old left-handed man with a aneurysms;Parkinson, D.; West, M.;J Neurosurg,1980