Simplified liver imaging reporting and data system for the diagnosis of hepatocellular carcinoma on gadoxetic acid-enhanced magnetic resonance imaging

Table 1 Clinicopathologic characteristics of the patients and hepatic observations, n (%)

Characteristic	Value
Patient (n = 331)
Mean age (yr)1	57.5 ± 10.9
Sex
Male	236 (71.3)
Female	95 (28.7)
Cause of liver disease
Hepatitis B virus	244 (73.7)
Hepatitis C virus	51 (15.4)
Hepatitis B and C virus	9 (2.7)
Alcohol	10 (3.0)
Autoimmune	4 (1.2)
NASH	3 (0.9)
Cirrhosis of unknown cause	10 (3.0)
Number of observations per patient
1	309 (93.4)
2	19 (5.7)
3	3 (0.9)
Observation (n = 356)
Size (mm)1
Overall	31.5 ± 25.9
HCC	35.8 ± 27.1
Non-HCC malignancy	43.2 ± 27.8
Benign lesion	21.0 ± 19.2
Final diagnosis
HCC	215 (60.4)
Non-HCC malignancy	25 (7.0)
ICC	7 (2.0)
CHC	8 (2.2)
Metastasis	5 (1.4)
Sarcomatoid carcinoma	4 (1.1)
Neuroendocrine carcinoma	1 (0.3)
Benign lesion	116 (32.6)
Haemangioma	14 (3.9)
DN	24 (6.7)
RN	42 (11.8)
FNH-like	17 (4.8)
Adenoma or adenomatoid hyperplasia	5 (1.4)
Abscess	2 (0.6)
Angiomyolipoma	2 (0.6)
Epithelioid angiomyolipoma	3 (0.8)
Abnormal perfusion	7 (2.0)
Standard reference of diagnosis
Pathologic diagnosis	286 (80.3)
Typical imaging features and follow-up	70 (19.7)
The time of follow-up (months)1	32.3 ± 13.5

¹Data are presented as the mean ± SD.

Unless stated otherwise, data are presented as the number of patients or observations with the percentage in parentheses. NASH: Nonalcoholic steatohepatitis; HCC: Hepatocellular carcinoma; ICC: Intrahepatic cholangiocarcinoma; CHC: Combined hepatocellular cholangiocarcinoma; DN: Dysplastic nodule; RN: Regenerative nodule; FNH: Focal nodular hyperplasia.