Abstract
The transgastric approach is a novel method for obtaining liver biopsies in patients undergoing upper gastrointestinal endosonography. Avoidance of vascular puncture and ability to acquire tissue in patients with obesity or ascites offers a practice niche for this technique. Although several series have reported on specimen adequacy, biopsy core length, and number of portal tracts, none has addressed the diagnostic challenges presented by the fragmented nature of these specimens. We systematically evaluated 113 transgastric liver biopsies obtained for diagnosis of parenchymal liver disease by 3 needle types and compared them with 100 percutaneous and 100 transjugular liver biopsies, respectively. Parameters recorded were number of tissue cores, sizes of longest and shortest cores, numbers of complete and incomplete portal tracts, morphologic characteristics, and adequacy of specimen for diagnosis and staging. In contrast to percutaneous and transjugular liver biopsies, transgastric biopsies often contained >10 tissue fragments and smaller tissue cores. In addition, 2 of the 3 types of transgastric needles obtained less numbers of complete portal tracts. Transjugular biopsies were also smaller and contained less number of complete portal tracts than percutaneous specimens but, unlike transgastric biopsies, only rarely contained >10 tissue fragments. Specimen adequacy for diagnosis and staging was 80%, 100%, and 98% for transgastric, percutaneous, and transjugular biopsies, respectively. Difference in specimen adequacy is related to tissue fragmentation of transgastric liver biopsies rather than biopsy core length or numbers of complete portal tracts. Tissue fragmentation is particularly challenging for staging chronic liver disease.
摘要
前言:经胃肝活检是一种获取肝活检标本的新方法,在患者在做胃肠道超声内镜时进行。因其可以避免刺到血管、且可以在肥胖或腹水患者得到合适的组织这些特点,所以这项技术具有很好的实际应用价值。尽管已有一些关于标本是否足够、活检芯针长度、汇管区数量的研究报道,但均未强调由于这些标本碎片化特性带来的诊断上的挑战。
材料与方法:我们系统性研究了113例经胃肝活检标本,应用3种类型穿刺针,诊断肝实质性疾病,并分别与100例经皮、100例经颈静脉活检相比较。记录数据包括:穿刺组织数量、最长和最短穿刺组织大小、完整及不完整汇管区数目、形态学特点、标本是否足以诊断和分期。
结果:与经皮和经颈静脉肝活检不同,经胃活检常包含>10条的组织碎片和小组织。3种经胃活检针中,2种得到较少数量的完整汇管区。与经皮活检相比,经颈静脉活检获得的组织也比较小、包含较少的完整汇管区,与经胃活检不同,只有很少数活检有>10条组织碎片。足以诊断和分期的经胃、经皮、经颈静脉活检标本的充足率分别为80%、100%和98%。
结论:标本足够率的差别与经胃肝活检的组织碎片有关,而与活检组织长度和完整汇管区数目无关。组织碎片对于慢性肝脏疾病的分期尤其具有挑战性。
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