Medullary infarction in Tohoku District, Japan: A clinical and radiological study of 214 cases:A clinical and radiological study of 214 cases
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Background and Purpose Since an advent of MRI, the clinical diagnosis of medullary infarction has been made possible, and such cases seem to be increasing. Therefore, we reviewed recent cases of medullary infarction verified by MRI, and examined its epidemiological, clinical, and MR imaging features.<BR>Subjects and Methods The survey was made on cases of medullary infarction diagnosed by brain MRI at 34 hospitals in Tohoku district, Japan, from 1996 to 2000. The analysis was mainly based on questionnaires, and, if MRI films were available, a neuroradiologist evaluated them.<BR>Results Two hundreds fourteen cases of medullary infarction were collected, consisting of 167 (78%) cases of lateral medullary infarction (LMI), 41 (19%) of medial medullary infarction (MMI), and 6 (3%) of both medial and lateral medullary infarction. The mean age of onset and the man to woman ratio were 60.7 year old, 2.7:1 in LMI, and 65.0 year old, 3.6:1 in MMI, respectively. The middle medulla was most frequently affected in LMI, and the upper medulla in MMI. In both types, vascular changes including arterial dissection were observed in the vertebral arteries. Severe cases were much fewer than previously reported. There was no difference of the prognosis between LMI and MMI. Diabetes mellitus was more frequently associated with MMI than LMI or controls.<BR>Conclusions The present study analyszed the world-largest number of cases of medullary infarction, and revealed many common and different aspects between LMI and MMI.
- 一般社団法人 日本脳卒中学会の論文
一般社団法人 日本脳卒中学会 | 論文
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