Table 1: Background data and clinical characteristics of all cases including the reported.

Background data and clinical characteristics Variables Cases Age (Y)    15–30 1  31–60 21  60–85 19 Sex    Female 36  Male 5 Concomitant disease    Chronic hepatitis 7  Sjögren's syndrome 1  CREST syndrome 1  Autoimmune thyroiditis 5  Malignant tumor 12  Hepatic hemangioma/FNH 3  PBC 4  DM 2  Immunodeficiency 2 Size in the greatest dimension of lesions (cm)  ⩽4 37  >4 4 Number of lesions    Solitary 35  Multiple 6 Location    Rt. lobe 21  Lt. lobe 13  Lt. lobe and Rt. lobe 2  NA 5 Treatment    Surgical resection 34  Transplantation 2  CNB and PEI 1  CNB and observation 3  Autopsy 1

Rt: right; Lt: left; Seg: segment； NA: not available; PBC: primary biliary cirrhosis; FNH: focal nodular hyperplasia; DM: diabetes mellitus; PEI: percutaneous ethanol injections; CNB: core needle biopsy; NA: not available.