Background: African Americans (AAs) with multiple sclerosis (MS) seem to have a more severe disease course than white Americans (WAs). To our knowledge, it is n
上食管异位胃黏膜(heterotopic gastric mucosa in the up-per esophagus,HGMUE)是指胃黏膜出现于食管上段,且可引起临床症状的一种疾病,临床少见.本文总结浙江大学医学院附属第二医院和浙江省肿瘤医院2000~2002年6000余例内镜检查中发现的19例患者的临床、内镜下特点.