Parameter:
(1) volume of left lobe of liver resected in mL
(2) volume of tumor in the left lobe of liver resected in mL
(3) volume of right lobe of liver resected in mL
(4) volume of tumor in the right lobe of liver resected in mL
(5) volume of entire liver in mL
total volume of tumor in mL =
= (volume of tumor in left lobe) + (volume of tumor in right lobe)
PHRR for left liver lobe in percent =
= ((volume of left lobe resected) – (volume of tumor in left lobe resected)) / ((volume of entire liver) – (total tumor volume)) * 100
PHRR for right liver lobe in percent =
= ((volume of right lobe resected) – (volume of tumor in right lobe resected)) / ((volume of entire liver) – (total tumor volume)) * 100
PHRR for entire liver in percent =
= ((volume of liver resected in left lobe) + (volume of liver resected in right lobe) – (volume of tumor in left lobe) – (volume of tumor in right lobe)) / ((volume of entire liver) – (total tumor volume)) * 100%
|
PHRR
|
Resection Class
|
|
< 30%
|
small
|
|
30-50%
|
middle
|
|
> 50%
|
large
|
Limitations:
• Lee and Hwang found the PHRR inaccurate for huge infiltrating tumors.
