Abstract
Background: In order to test the influence of a pneumoperitoneum on the peritoneal implantation of free intraperitoneal colon cancer cells, 40 male syngeneic WAG rats were at random divided into four groups.
Methods: Group 1 (n=10) animals underwent a midline laparotomy and 104 CC531 colon cancer cells were injected intraperitoneally (IP); in group 2 (n=10) 104 CC531 cells were injected IP without further manipulation; in group 3 (n=10) a pneumoperitoneum up to 10 mmHg was created after the IP injection of the same amount of CC531 cells. The pneumoperitoneum was maintained for 15 min. Finally in group 4 (n=10) after the IP injection of 104 CC531 cells and after the creation of a pneumoperitoneum, two 14-G IV catheters simulating trocars were introduced in each flank. A follow-up period of 8 weeks was used. Tumor implantation was scored according to the peritoneal cancer index of Eggermont and the index of Chauffert.
Results: Tumor nodules were found varying from 60% in groups 1–3 to 50% in group 4. There was no statistical difference between the implantation rate in the four groups. A port-site recurrence was seen in group 4; all the other tumor implants were located in the mesenterium, omentum, internal genitals, or parietal peritoneum.
Conclusions: The presence of a pneumoperitoneum does not enhance the implantation of free intraperitoneal malignant colon cancer cells in the rat, but the presence of a “port” may lead to abdominal-wall metastases.
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Hubens, G., Pauwels, M., Hubens, A. et al. The influence of a pneumoperitoneum on the peritoneal implantation of free intraperitoneal colon cancer cells. Surg Endosc 10, 809–812 (1996). https://doi.org/10.1007/BF00189539
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DOI: https://doi.org/10.1007/BF00189539