2017年 · 第51卷第02期

multiple sclerosis (MS) is the most common type of demyelinating disease of the central nervous system, which is more common in young and middle-aged people and has a high disability rate. The total number of patients worldwide exceeds 2.5 million^[1]。 MRI can objectively reflect the microscopic pathological changes of MS lesions and normal gray and white matter, and assist in differential diagnosis, evaluation of therapeutic effect and prognosis. In 2001, the International Committee of MS Experts officially incorporated MRI into the diagnostic criteria of MS (McDonald Criteria 2001 Edition). MRI diagnostic criteria for MS highlight the diagnostic core of spatial and temporal multiplicity of white matter lesions in the central nervous system (CNS). MRI can support and supplement clinical information, and provide help for early diagnosis and treatment of MS^[2]。

endovascular aortic repair (EVAR) has the advantages of less trauma, fast recovery, short surgery and hospital stay, etc. It is the first choice treatment for abdominal aortic aneurysm (AAA), especially for high-risk patients. Among AAA patients, 43% (157/363) of the lesions involved one common iliac artery and 11% (40/363) involved bilateral common iliac arteries^[1]And internal iliac artery (IIA) involvement is a common phenomenon in solitary iliac aneurysms and AAA with common iliac aneurysm lesions. IIA is responsible for the blood supply to tissues or organs such as gluteal muscle, pelvic cavity, and spinal cord. For such patients, it is often necessary to consider how to treat unilateral or bilateral internal iliac arteries when performing EVAR. The author summarizes the significance and technique of preserving IIA in EVAR as follows.