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All the preoperative biopsies of patients suffering colorectal cancer (CRC) will be immunohistochemically stained with a pancytokeratin marker to detect Tumor buds. then, the intratumoral buds (ITB) in the densest Region of Tumor buds, namely the "hot spot" will be counted. Subsequently, the probability of N stage (lymphnodes), M stage (metastases) and disease free survival (DFS) will be calculated based on an existing logistic Regression model already developed by our previous retrospective work. Additionally, a Standardisation of ITB using a well- established Software will develop an algorithm which will help to eliminate inter- observer variability of Tumor budding Counts.
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| Measure | Description | Time Frame |
|---|---|---|
| correlation of ITB based calculated N stage with real N stage in CRC - patients | 24 months |
| Measure | Description | Time Frame |
|---|---|---|
| correlation of ITB based calculated DFS with real DFS in CRC - patients | 24 months |
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Inclusion Criteria:
Exclusion Criteria:
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Stages I to IV colorectal cancer
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| Name | Affiliation | Role |
|---|---|---|
| Beat Schnüriger, PD | Insel Gruppe AG, University Hospital Bern | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Department of visceral surgery and transplant surgery, Berne University Hospital | Bern | 3010 | Switzerland |
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Tumor buds will be Immunohistochemically stained with a pancytokeratin marker