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Braumann, C. et al.

Chris Braumann, Carmen Balague, Nina Guenther, Charalambos Menenakos, Christoph A. Jacobi,

Application of a solid tumor model to evaluate tumor recurrence after an open or laparoscopic rectal resection in rats.

PURPOSE: We used a solid tumor model to evaluate the influence of laparotomy versus laparoscopy on tumor growth after curative resection for rectal cancer in rats. METHODS: Colon tumor cells (DHD/K12/TRb) were administered intraperitoneally in 15 rats, which were used as solid tumor donors. Twenty-one days later, a 20-mg piece was then implanted in the rectal submucosa of the study rats (n=45). Animals were randomized into 3 groups for rectal resection either open or laparoscopic using either carbon dioxide (CO2) or helium for pneumoperitoneum. Autopsy took place 21 days after resection and tumor recurrence was evaluated. RESULTS: Port-site metastasis was observed after laparoscopy with CO2 (1 animal) and helium (1), whereas intraperitoneal tumor growth was detected in 2 and 3 animals of these groups. No tumor recurrence was observed after open surgery. CONCLUSIONS: Our solid tumor model is a novel neoplastic model that might simulate the clinical situation of an upper rectal carcinoma. It might be helpful to develop new protocols in studying solid tumor biology and different surgical procedures for cancer to address problematic issues in oncologic research.[1]

References

Application of a solid tumor model to evaluate tumor recurrence after an open or laparoscopic rectal resection in rats. Braumann, C., Balague, C., Guenther, N., Menenakos, C., Jacobi, C.A. Surg. Laparosc. Endosc. Percutan. Tech (2008) [Pubmed]

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