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Purpose:. Patient-derived xenograft (PDX) models accurately recapitulate the tumor of origin in terms of histopathology, genomic landscape, and therapeutic response, but some limitations due to costs associated with their maintenance and restricted amenability for large-scale screenings still exist.
Purpose:. Recent sequencing studies revealed that a subset of colorectal cancer harbors a significantly higher number of somatic mutations. These hypermutated tumors show distinct clinicopathologic features. However, the prognostic impact of the hypermutated tumors is not clearly established. Experimental Design:. We analyzed tumor mutation burden (TMB) from targeted next-generation sequencing data of 40 major genes in 516 patients with colorectal cancer. TMB was defined as total number of nonsynonymous mutations per tumor. Cutoff value for TMB-high was chosen by which best discriminated relapse-free survival (RFS) using the Contal and O'Quigley method. Results:. In the TCGA data, mutation count of the selected 40 genes reflected the whole exo.
Purpose:. To investigate the clinical relevance of macrophages in liver metastasis of colorectal cancer and their influence on angiogenesis and patient survival. Moreover to evaluate specific blood monocytes as markers of disease recurrence. Experimental design: In a mouse model with spontaneous liver metastasis, the angiogenic characteristics of tumor- and metastasis (MAM)-associated macrophages were evaluated. Macrophages and the vasculature from 130 primary tumor (pTU) and 123 patients with liver metastasis were assessed. In vivo and in human samples, the clinical relevance of macrophage VEGFR1 expression was analyzed. Blood samples from patients ( n = 157, 80 pTU and 77 liver metastasis) were analyzed for assessing VEGFR1-positive (VEGFR.

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