Background: The role of desmoplastic reaction (DR) in colorectal cancer invasion is still an open question. The presence of fibrous connective tissue may represent a barrier against cancer diffusion or a stroma to build up and support the tumor. Aims of the present study were to evaluate the influence of DR on long-term survival and to validate a reliable quantitative method to measure the desmoplastic tissue.
Methods: This retrospective study included 86 patients who underwent radical colorectal resection for cancer, from a database of 429 patients. To achieve a quantitative histochemical measurement of DR, digital images were analyzed by a computerized image analysis program. DR was related to the overall survival and the quantitative method was related to the traditional one.
Results: By using the Kaplan-Meier analysis, DR was found to be significantly associated with overall survival. Patients with a higher value of DR survived longer than those with smaller DR and the quantitative results were in accordance with those obtained by using the traditional methods.
Conclusions: Desmoplasia seems to be a protective factor for survival in patients with colorectal carcinoma. The quantitative technique is easily standardized and can be routinely performed, so that DR may be a useful prognostic indicator. Notwithstanding, the conflicting outcomes reported in literature about DR need further biological and molecular studies to achieve definitive conclusions.
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