Estimation of liver tumor volume using different formulas - an experimental study in rats

Area of Science:

• Oncology
• Surgical Research
• Animal Models

Background:

• Accurate measurement of experimental liver tumors is crucial for research.
• Existing methods for estimating tumor volume can be imprecise.
• Non-invasive or minimally invasive techniques are needed for in-vivo tumor assessment.

Purpose of the Study:

• To evaluate and compare four formulas for calculating the volume of experimental liver tumors in rats.
• To identify the most accurate formula for estimating unremoved liver tumor volume.
• To provide a reliable method for assessing tumor growth in preclinical studies.

Main Methods:

• Induction of solitary ellipsoid liver tumors in rats using tumor-cell suspension.
• Measurement of largest (a) and smallest (b) superficial tumor diameters during laparotomy using vernier calipers.
• Comparison of calculated volumes from four formulas against actual volumes derived from extirpated tumors and tumor weights.

Main Results:

• The formula V = a x b²/2 demonstrated the highest accuracy in estimating tumor volume within the 15-700 mm³ range.
• Regression analyses confirmed the superiority of this formula compared to others.
• This method provides a reliable estimation of unremoved liver tumor volume.

Conclusions:

• The formula V = a x b²/2 is the optimal method for calculating the volume of experimental liver tumors in rats.
• This validated formula can enhance the precision of preclinical liver cancer research.
• Accurate tumor volume assessment is vital for evaluating treatment efficacy in animal models.