局灶性肝脏病变 (FLL) 已成为腹部影像学中越来越常见的发现，尤其是无症状和偶然的肝脏病变。胃肠病学家和肝病学家经常会诊这些患者，并对多种类型的肝脏病变的治疗提出建议，包括肝细胞腺瘤、局灶性结节性增生、血管瘤和包括多囊肝病在内的肝囊性病变。在 FLL 的鉴别诊断中，恶性肿瘤是重要的考虑因素，医疗保健提供者必须熟悉 FLL 的诊断和治疗。本美国胃肠病学会实践指南使用现有的最佳证据为最常见的 FLL 提供诊断和管理建议。版权所有 © 2024 美国胃肠病学会。

Focal liver lesions (FLLs) have become an increasingly common finding on abdominal imaging, especially asymptomatic and incidental liver lesions. Gastroenterologists and hepatologists often see these patients in consultation and make recommendations for management of multiple types of liver lesions, including hepatocellular adenoma, focal nodular hyperplasia, hemangioma, and hepatic cystic lesions including polycystic liver disease. Malignancy is important to consider in the differential diagnosis of FLLs, and healthcare providers must be familiar with the diagnosis and management of FLLs. This American College of Gastroenterology practice guideline uses the best evidence available to make diagnosis and management recommendations for the most common FLLs.Copyright © 2024 by The American College of Gastroenterology.