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The Almost-Normal Liver Biopsy: Presentation, Clinical Associations, and Outcome.

几乎正常的肝脏活检:表现、临床相关性及结果

Czeczok TW,Van Arnam JS,Wood LD,Torbenson MS,Mounajjed T

Abstract

Liver biopsies obtained for abnormal liver enzymes or unexplained ascites occasionally appear histologically almost normal. The differential diagnosis for these cases is challenging because literature addressing this topic is lacking. We aimed to establish a differential diagnosis and determine clinical associations and outcomes for almost-normal liver biopsies. Ninety-seven histologically almost-normal liver biopsies were collected from 2 institutions. All cases lacked significant inflammation, fatty change, biliary tract disease, vascular disease, nodular regenerative hyperplasia, iron overload, inherited metabolic or storage disorder, viral hepatitis, or fibrosis. Biopsies for follow-up of known liver diseases were excluded. Transplant biopsies, lesion-directed biopsies, biopsies obtained during bariatric surgery, liver donor biopsies, and biopsies to evaluate methotrexate toxicity were excluded. Clinical (including follow-up) and laboratory data were collected. The frequency of almost-normal liver biopsies was 0.6% and 3.7% at the 2 institutions. The most common biopsy indications were elevated liver biochemistries or clinical findings that suggested portal hypertension. In 70 patients (72%), an associated clinical abnormality was identified; the most common were autoimmune systemic inflammatory conditions (18%), vascular/ischemic events (13%), metabolic syndrome (11%), drug effects (8%), and inflammatory conditions of the gastrointestinal tract (7%). The median follow-up period was 4.3 years (range=0 to 10 y); detailed clinical follow-up was available for 66 patients (68%). Liver biochemistries normalized in 32 patients (48.5%) and remained elevated in 34 (51.5%). Seven patients (7.2%) eventually developed chronic liver disease (autoimmune hepatitis [n=3], primary biliary cirrhosis [n=3], cryptogenic cirrhosis [n=1]). This multicenter study determines the differential diagnosis for almost-normal liver biopsies; this will guide pathologists in subsequent workup efforts in these challenging cases.

摘要

由于肝酶指标异常或不明原因的腹水而进行活检的肝组织偶尔会表现为组织学上几乎正常。对于这些病例的鉴别诊断具有挑战性,因为解决这方面问题的文献相对缺乏。因此,我们旨在构建一个鉴别诊断,并确定几乎正常肝活检的临床联系和结果。从2个医疗机构中收集了97个组织学几乎正常的肝活检组织。所有病例均缺乏显著的炎症、脂肪变性、胆道疾病、血管疾病、结节再生性增生、铁负荷过重、遗传性代谢或储存紊乱、病毒性肝炎或纤维化等基础肝病。用于对已知肝脏疾病随访的活检组织排除在外。还有移植活检、病灶导向的活检、在减肥手术中获得的活检、肝供者活检和评估甲氨毒性的活检等也均排除在外。对临床(包括随访)和实验室数据进行收集。在这两家机构中,出现几乎正常的肝脏活检的频率为0.6%3.7%。最常见的活检原因是肝生化指标升高或提示门脉高压的临床发现。在70名患者中(72%),发现了相关的临床异常;其中最常见的是自身免疫系统炎症 (18%)、血管/缺血性损伤(13%)、代谢综合征(11%)、药物作用(8%)和胃肠道炎症(7%)。中位随访期为4.3(范围为0-10);其中66名患者(68%)有详细的临床随访信息。随访中32名患者(48.5%)肝生化恢复正常,34(51.5%)保持升高。7名患者(7.2%)最终发展成慢性肝病(自体免疫性肝炎n=3,原发性胆汁性肝硬化n=3,隐原性肝硬化n=1)。这个多中心研究确定了几乎正常肝脏活检的鉴别诊断流程;这对病理学家面对那些有挑战的肝活检病例进行后续诊断具有指导价值。

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