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Erschienen in: Annals of Surgical Oncology 9/2010

01.09.2010 | Colorectal Cancer

A Clinicopathologic Analysis of Peritoneal Metastases of Colorectal and Appendiceal Origin

verfasst von: Sjoerd C. Bruin, MD, Victor J. Verwaal, MD, PhD, Andrew Vincent, MSc, Laura J. van‘t Veer, PhD, Marie-Louise F. van Velthuysen, MD, PhD

Erschienen in: Annals of Surgical Oncology | Ausgabe 9/2010

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Abstract

Objective

To predict clinical outcome by classification of peritoneal metastases (PM) of colorectal or appendiceal origin.

Background

This study investigates whether standardized histological classification can predict outcome for PM of colorectal or appendiceal origin treated with cytoreduction and hyperthermic intraperitoneal chemotherapy (HIPEC).

Methods

Histology of PM (n = 269) was evaluated by analysis of mitotic activity, atypia, cellularity, and mucinous component. For overall survival (OS) and disease-free survival (DFS) Cox proportional-hazard models were constructed. Covariates included tumor, patient, and treatment characteristics.

Results

PM could be categorized into four groups: low-grade, well-differentiated mucinous tumor (DPAM); intermediated-grade mucinous carcinoma (PMCA-i); high-grade mucinous carcinoma (PMCA); and high-grade nonmucinous carcinoma (PCA). Multivariate analysis showed that histological classification, gender, number of segments affected, completeness of cytoreduction, and HIPEC as primary treatment were significant related to OS and DFS. The 5-year OS was 64% in the DPAM group, 36% in the PMCA group, and 24% in the PCA group. Of PM originating from an appendix tumor, 29% were of non-DPAM type. Of primary colorectal tumors, 37% resulted in mucinous PM, and another 26% of PM of colorectal origin had partly mucinous histology.

Conclusion

Histology is a significant predictive factor of OS and DFS in PM treated with surgical cytoreduction and HIPEC. Low-grade PM (DPAM) should be regarded as a separate entity because of its clearly different clinical course. High-grade mucinous PM has significant better prognosis than nonmucinous PM and should thus be distinguished.
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Metadaten
Titel
A Clinicopathologic Analysis of Peritoneal Metastases of Colorectal and Appendiceal Origin
verfasst von
Sjoerd C. Bruin, MD
Victor J. Verwaal, MD, PhD
Andrew Vincent, MSc
Laura J. van‘t Veer, PhD
Marie-Louise F. van Velthuysen, MD, PhD
Publikationsdatum
01.09.2010
Verlag
Springer-Verlag
Erschienen in
Annals of Surgical Oncology / Ausgabe 9/2010
Print ISSN: 1068-9265
Elektronische ISSN: 1534-4681
DOI
https://doi.org/10.1245/s10434-010-0984-5

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