Epiction of the Genomic and Genetic Landscape Identifies CCL5 as a Protective Factor in Colorectal Neuroendocrine Carcinoma

Background: Colorectal neuroendocrine carcinomas (CRNECs) are highly aggressive tumours with poor prognosis and low incidence. To date, the genomic landscape and molecular pathway alterations have not been elucidated.

Methods: Tissue sections and clinical information were collected as an in-house cohort (2010-2020). Large-scale genomic and genetic panels were applied to identify the genomic and genetic alterations of CRNEC. Through the depiction of the genomic landscape and transcriptome profile, we compared the difference between CRNEC and CR neuroendocrine tumours (CRNETs). Immunohistochemistry (IHC) staining and immunofluorescence (IF) staining were performed to confirm the genetic alterations.