Clinical study on the efficacy of laparoscopic hepatectomy via the retroperitoneal approach for treating liver tumors

Table 1 Clinical data of the patients and tumor characteristics, n (%)

Variables	n (%)
Sex (male)	34 (47)
Age (years, mean ± SD)	45 (34-72)
BMI (kg/m², mean ± SD)	23.14 ± 3.27
Child-Pugh classification
Child-Pugh A	67 (93)
Child-Pugh B	5 (7)
Past medical history
Liver cirrhosis	20 (28)
History of lung surgery	10 (14)
Benign liver diseases
Hemangioma	16 (22)
FNH	4 (6)
Hepatolithiasis	1 (1)
Malignant liver tumors
HCC	45 (63)
CRLM	6 (8)
Tumor diameter (cm)	7.5 ± 3.4
Anatomical location
S6	30 (42)
S7	27 (38)
S8	15 (20)

BMI: Body mass index; FNH: Focal nodular hyperplasia; HCC: Hepatocellular carcinoma; CRLM: Colorectal liver metastases.