Diagnostic and Interventional Radiology
Unspecified - Original Article

Ultrasound-guided percutaneous implantation of rabbit VX2 carcinoma, using a coaxial technique and gelfoam pellet injection combination to establish a rabbit liver tumor model

1.

School of Medical Imaging, Guizhou Medical University, Guizhou, China

2.

Department of Interventional Radiology, The Affiliated Cancer Hospital of Guizhou Medical University, Guizhou, China

3.

Department of Radiology, the Affiliated Hospital of Guizhou Medical University, Guizhou, China

Diagn Interv Radiol 2022; 28: 103-107
DOI: 10.5152/dir.2021.20533
Read: 363 Downloads: 200 Published: 01 January 2022

PURPOSE
We aimed to investigate the safety and tumor seeding rate of a coaxial implantation technique combined with injection of a gelfoam pellet in establishing a VX2 liver tumor model in rabbits.

METHODS
A VX2 liver tumor model was established in 60 male New Zealand white rabbits, which were randomly divided into 3 groups (20 in each group) based on implantation technique (all performed under ultrasound guidance): group A, single needle only; group B, single needle with injection of a gelfoam pellet; or group C, coaxial technique with injection of a gelfoam pellet. The rates of liver tumor formation and tumor seeding to extrahepatic tissues were compared 2 weeks after implantation. Data were also collected regarding procedure time, number of punctures, occurrence of complications, and mortality rate.

RESULTS
A VX2 liver tumor model was established in all 60 rabbits (100%, 60/60). Ectopic implantation rate was 70% (14/20) in group A, 35% (7/20) in group B, and 5% (1/20) in group C, with significant difference among the groups (p < 0.001). Post hoc analysis showed significant difference between group A and group C (p < 0.001). However, there were no significant differences between group B and group A or group C (p = 0.027, p = 0.048, respectively). There were no significant differences among the groups in terms of procedure time (p = 0.405) or number of punctures (p = 0.612). No complications or deaths occurred.

CONCLUSION
A coaxial technique with injection of a gelfoam pellet is an effective and safe method for VX2 liver tumor implantation in rabbits, and this technique can reduce the risk of tumor seeding to the abdominal wall and omentum.

You may cite this article as: Cheng Z, Zhang S, Wang L, et al. Ultrasound-guided percutaneous implantation of rabbit VX2 carcinoma, using a coaxial technique and gelfoam pellet injection combination to establish a rabbit liver tumor model. Diagn Interv Radiol. 2022;28(1):103-107.

Files
EISSN 1305-3612