橄榄脑桥小脑萎缩 (olivopontocerbellar atrophy,OPCA) ,是一种以共济失调为主 ,呈慢性进行性发展的疾病 ,为遗传性共济失调中较常见的一种类型。在 CT、MRI问世之前 ,该病的诊断仅靠尸检方能作出。随着影像技术的发展 ,头颅 MRI已成为临床诊断 OPCA的首选方法。现将 1 992—1 Olivopontocerbellar atrophy (OPCA), a disorder characterized by ataxia and chronic progressive development, is the most common type of hereditary ataxia. Before the advent of CT, MRI, the diagnosis of the disease can only be made by autopsy. With the development of imaging technology, cranial MRI has become the preferred method of clinical diagnosis of OPCA. Now 1 992-1