peripheral branch meaning in English

周围支ramus peripheralis{拉}

In conclusion , especially patients with a hepaticojejunostomy , those with an early diagnosis of nas , and those with nas presenting at the level of the peripheral branches of the biliary tree , are at risk for progressive disease with severe outcome
结论：肝移植术中行肝十二指肠吻合，早期诊断为nas以及狭窄部位处于胆道系统的周围支是疾病进展的危险因素。