Published October 29, 2021 | Version v1
Journal article Open

The role of tumoral stroma in determining the forecast of recurrence and fatal consequence of stage IIA-IIIB colorectal cancer

Creators

  • 1. Kharkiv Medical Academy of Postgraduate Education

Description

Colorectal cancer (CRC) ranks 2nd in the structure of mortality from malignant neoplasms (MN). One of the criteria for the prognosis of CRC may be a tumor stroma, which has not been widely used in clinical practice. The aim was to determine the main morphological features of the stroma CRC T3N0-2M0 and search for prognostic criteria for their recurrence and lethal outcome according to the operating material and autopsy. Materials and methods. Group I included primary CRC without recurrence. The average recurrence-free period was 5 years (62.5±16.5 months). Group II – primary CRC with recurrence; IIA – with recurrences within 5 years from the date of tumor removal that did not lead to death; IIB – with the appearance of recurrence and lethal consequence of the generalization of the tumor process within 5 years from the moment of removal of the primary tumor. CRC micropreparations made according to the standard method with G + E staining were studied; immunohistochemical study was performed using monoclonal antibodies to smooth muscle actin alpha. Results. Stromal-parenchymal ratio >50 % is a prognostic criterion for recurrence (p<0.05) and shorter recurrence-free survival (p<0.001) of patients with stage IIA-IIIB CRC. Immature stroma type CRC stage IIA-IIIB is associated with the presence of tumor budding (p<0.001), G3 differentiation (p<0.01), shorter recurrence-free survival (p<0.001); among recurrent CRCs, the immature type of stroma is associated with the lethal outcome of patients (p<0.05). Expressed levels of tumor-activated fibroblasts are one of the criteria for immature CRC stroma (p<0.003), but as an independent prognostic criterion has limited prognostic value. Conclusions. TSR and immature type of stroma are prognostic criteria for recurrence and recurrence period of CRC pT3N0-2M0, more typical of tumors of patients with recurrence and lethal outcome with the same ratio of tumors by differentiation.

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References

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