Table 1 Characteristics of patients and tumors

Total number of patients

13

Age, years

  Mean ± SD (range)

63.4 ± 11.8 (37 to 86)

Sex

  Male/female

12/1

Hepatitis B virus

  Positive/negative

7/6

Hepatitis C virus

  Positive/negative

2/11

Child-Pugh classification

  A/B/C

13/0/0

Main tumor location

  Anterior/posterior/median/lateral section

5/4/3/1

Tumor size, cm

  Mean ± SD (range)

11.8 ± 4.3 (3.5–19)

Number of tumors

  Single/multiple

6/7

Extension of thrombus

  Inferior vena cava/right atrium

7/6

Preoperative extrahepatic metastases

  None/lung/adrenal gland/lymph nodes

5/5/2/1

Status of metastases after surgery

  Resected/regressed or stationary/progressed

3/1/4

Postoperative metastatic recurrence

  Liver/lung/lymph node/adrenal gland/inferior vena cava/brain

8/7/4/2/2/2