肝局灶性结节增生(focal nodular hyperplasia,FNH)是临床上常见的良性肿瘤,占肝良性肿瘤的25%左右,是一种少见的肝细胞来源的良性肿瘤,其临床特点为发病年轻化、诊断困难、手术难度大等。我科曾对数十例FNH患者行手术切除,效果满意,目前就1例肝右叶巨大FNH作一报道。1临床资料患者女性,17岁,因间断腹痛4年,发现肝占位性病变20 d余入院,无口服避孕药病史。在当地医院MRI提示肝右叶巨大占位,考虑 Focal nodular hyperplasia (FNH) is a common benign tumor in clinic, accounting for about 25% of benign liver tumors. It is a rare benign tumor derived from hepatocytes. Its clinical features are younger onset of disease , Difficult to diagnose, difficult operation and so on. My department had dozens of cases of FNH patients underwent surgical resection, the effect is satisfactory, at present, a case of a report of a large right liver FNH. 1 Clinical data Female patients, aged 17, due to intermittent abdominal pain for 4 years and found liver lesions more than 20 d admission, no history of oral contraceptives. MRI in the local hospital prompts the huge right liver lobe occupancy, consider