Methodological Consensus Diseases Consensus State of the Art of Related Disciplines
Methodological Consensus
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Conflicting Points

1. Eligibility
V. Verwaal

Curriculum Vitae
2. Pre-operative work-up
T.D. Yan

Curriculum Vitae
3.Intraoperative staging system
A. Gomez Portilla

Curriculum Vitae
4.Technical aspects of the cytoreductive surgery
S. O’Dwyer

Curriculum Vitae
5.Residual disease evaluation
S. Moreno Gonzalez

Curriculum Vitae
6A. Hyperthermic Intraoperative Chemotherapy: nomenclature and modality of perfusion
O. Glehen

Curriculum Vitae
6B. Chemotherapies, carrier solution and optimal temperature
D. Elias

Curriculum Vitae
7.Morbidity, toxicity and mortality classification systems
R. Younan

Curriculum Vitae
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4. Technical aspects of the surgery

4.1. In case of limited disease dissemination to parietal peritoneum in which one of the following situations a partial parietal peritonectomy restricted to the macroscopically involved regions could be indicated?(more than one alternative allowed)

Pseudomyxoma peritonei;
First round: 45,16 % - Second round: 65,63 %
Cystoadenocarcinoma G1 of the appendix;
First round: 74,19 % - Second round: 81,25 %
Cystoadenocarcinoma G2 G3 of the appendix;
First round: 67,74 % - Second round: 78,13 %
Adenocarcinoma of the appendix;
First round: 83,87 % - Second round: 90,63 %
Carcinoid tumor of the appendix;
First round: 83,87 % - Second round: 87,50 %
Mucinous G1 G2 G3 colorectal cancer;
First round: 70,97 % - Second round: 78,13 %
Intestinal colorectal cancer;
First round: 87,10 % - Second round: 90,63 %
Diffuse gastric cancer;
First round: 64,52 % - Second round: 75,00 %
Intestinal gastric cancer;
First round: 70,97 % - Second round: 87,50 %
Serous ovarian cancer;
First round: 80,65 % - Second round: 96,88 %
Mucinous ovarian cancer;
First round: 61,29 % - Second round: 75,00 %
Diffuse malignant mesothelioma;
First round: 29,03 % - Second round: 46,88 %

There is no circumstance in the above mentioned diseases in which a surgically sparing approach could be considered. A complete parietal peritonectomy is indicated in all these situations even in the presence of a localized disease, irrespective of the primary tumor histology.
First round: 0 % - Second round: 0 %

4.2. In the presence of numerous small metastatic nodules (<2.5mm) in the mesentery, without infiltration, after the completion of cytoreduction in other intra-abdominal districts which approach could be the best one? (just one alternative allowed)

cytoreduction with electro evaporization;
First round: 90,32 % - Second round: 100,00 %
sparing policy leaving these residues to be treated by the intraperitoneal chemotherapy.
First round: 9,68 % - Second round: 0 %

4.3. In the closed abdomen technique for the hyperthermic intraperitoneal chemotherapy which one is the optimal timing for intestinal anastomosis after the peritonectomy?
(just one alternative allowed)

Before the perfusion; ([24],[25])
First round: 35,48 % - Second round: 34,38 %
After the perfusion;
First round: 48,39 % - Second round: 53,13 %
The constructive procedure could be performed in any time after the cytoreduction, without a significant impact on the morbidity and/or mortality.
First round: 16,13 % - Second round: 12,50 %

4.4. Indications of protective proximal ostomies after cytoreductive surgery are not uniform, with no consensus in the literature. When a protective ostomies should be indicated?
(more than one alternative allowed)

whenever all rectal resections is performed;([26])
First round: 22,58 % - Second round: 12,50 %
in cases of low anterior resections in which the preservation of the rectum is not possible;([27],[28])
First round: 32,26 % - Second round: 21,88 %
In case of ileo-rectal anastomoses;
First round: 29,03 % - Second round: 15,63 %
the policy for protective stoma could be flexible and the procedure done at surgeon discretion; the performance of unprotected colorectal anastomoses does not influence significantly the morbidity and mortality.([29])
First round: 61,29 % - Second round: 87,50 %

References

[24] Kusamura S, Younan R, Baratti D, Costanzo P, Favaro M, Gavazzi C, Deraco M. Cytoreductive surgery followed by intraperitoneal hyperthermic perfusion: analysis of morbidity and mortality in 209 peritoneal surface malignancies treated with closed abdomen technique. Cancer. 2006 Mar 1;106(5):1144-53.
[25] Younan R, Kusamura S, Baratti D, Oliva GD, Costanzo P, Favaro M, Gavazzi C, Deraco M. Bowel complications in 203 cases of peritoneal surface malignancies treated with peritonectomy and closed-technique intraperitoneal hyperthermic perfusion. Ann Surg Oncol. 2005 Nov;12(11):910-8. Epub 2005 Sep 21
[26] Verwaal VJ, van Tinteren H, Ruth SV, Zoetmulder FA. Toxicity of cytoreductive surgery and hyperthermic intra-peritoneal chemotherapy. J Surg Oncol 2004;85:61-7.
[27] Moran BJ, Cecil TD. The etiology, clinical presentation, and management of pseudomyxoma peritonei. Surg Oncol Clin N Am 2003; 12:585-603.
[28] Sugarbaker PH, Ronnett BM, Archer A, Averbach AM, Bland R, Chang D, et al. Pseudomyxoma peritonei syndrome. Adv Surg 1997;30:233-80.
[29] Shen P, Hawksworth J, Lovato J, Loggie BW, Geisinger KR, Fleming RA, Levine EA.  Cytoreductive surgery and intraperitoneal hyperthermic chemotherapy with mitomycin C for peritoneal carcinomatosis from nonappendiceal colorectal carcinoma. Ann Surg Oncol 2004; 11:178-86.

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