Colorectal cancer with residual polyp of origin: A model of malignant transformation

Brooke R. Druliner, Shahrooz Rashtak, Xiaoyang Ruan, Taejeong Bae, Nikolaos Vasmatzis, Daniel O’Brien, Ruth Johnson, Donna Felmlee-Devine, Jill Washechek-Aletto, Nivedita Basu, Hongfang Liu, Thomas Smyrk, Alexej Abyzov, Lisa A. Boardman

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


The majority of colorectal cancers (CRCs) arise from adenomatous polyps. In this study, we sought to present the underrecognized CRC with the residual polyp of origin (CRC RPO+) as an entity to be utilized as a model to study colorectal carcinogenesis. We identified all subjects with biopsy-proven CRC RPO+ that were evaluated over 10 years at Mayo Clinic, Rochester, MN, and compared their clinical and pathologic characteristics to CRC without remnant polyps (CRC RPO−). Overall survival and disease-free survival overlap with an equivalent hazard ratio between CRC RPO+ and RPO− cases when age, stage, and grade are adjusted. The somatic genomic profile obtained by whole genome sequencing and the gene expression profiles by RNA-seq for CRC RPO+ tumors were compared with that of age -and gender-matched CRC RPO− evaluated by The Cancer Genome Atlas. CRC RPO+ cases were more commonly found with lower-grade, earlier-stage disease than CRC RPO−. However, within the same disease stage and grade, their clinical course is very similar to that of CRC RPO−. The mutation frequencies of commonly mutated genes in CRC are similar between CRC RPO+ and RPO− cases. Likewise, gene expression patterns are indistinguishable between the RPO+ and RPO− cases. We have confirmed that CRC RPO+ is clinically and biologically similar to CRC RPO− and may be utilized as a model of the adenoma to carcinoma transition.

Original languageEnglish (US)
Pages (from-to)280-286
Number of pages7
JournalTranslational Oncology
Issue number4
StatePublished - Aug 2016

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


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