• Dr. Kennedy is certified by the American Board of Colon and Rectal Surgery and by the American Board of Surgery. In addition, he is a Fellow of the American College of Surgeons and a Fellow of the American Society of Colon and Rectal Surgery. Kennedy’s main interest is in laparoscopic approaches to complex colorectal disease. He has experience with all advanced laparoscopic and minimally invasive approaches including single-incision laparoscopy and robotic surgery. His clinical areas of expertise include colon cancer, rectal cancer, inflammatory bowel disease, benign conditions of colon, rectum, and anus, and endoscopic treatment of colonic disease.

    Dr. Kennedy was born and raised in Montana and is a graduate of the University of Washington School of Medicine in Seattle. He earned his doctorate in cancer biology at the University of Wisconsin School of Medicine and Public Health, where he also completed his general surgery residency in 2006. Dr. Kennedy then completed his colon and rectal surgery fellowship at the Mayo Clinic in Rochester, Minn., in 2007.

    Dr. Kennedy’s research efforts are focused on chemoprevention of colon and rectal cancer. His funded laboratory uses genetic models to better understand how chemicals prevent tumor formation and what genetic pathways are responsible for their effects. The ultimate goal is to identify targeted agents that are better tolerated by patients in hopes of preventing colon and rectal cancer.
  • Selected Publications

    Academic Article

    Year Title Altmetric
    2019 Panitumumab-IRDye800CW for Fluorescence-Guided Surgical Resection of Colorectal Cancer 2019
    2019 Deuterated Curcuminoids: Synthesis, Structures, Computational/Docking and Comparative Cell Viability Assays against Colorectal Cancer 2019
    2019 SSAT State-of-the-Art Conference: Advances in the Management of Rectal Cancer 2019
    2018 The role of mechanical bowel preparation and oral antibiotics for left-sided laparoscopic and open elective restorative colorectal surgery with and without faecal diversion. 2018
    2018 Synthesis, Computational Docking Study, and Biological Evaluation of a Library of Heterocyclic Curcuminoids with Remarkable Antitumor Activity. 2018
    2018 Achieving health equity in surgery through enhanced recovery after surgery (ERAS): The elimination of racial disparities in post-operative length-of-stay is sustained long-term 2018
    2018 A tertiary care hospital's 10 years' experience with rectal ultrasound in early rectal cancer. 2018
    2018 Racial Disparities After Stoma Construction Exist in Time to Closure After 1 Year but Not in Overall Stoma Reversal Rates 2018
    2017 Enhanced Recovery After Surgery (ERAS) Eliminates Racial Disparities in Postoperative Length of Stay After Colorectal Surgery 2017
    2017 The aryl hydrocarbon receptor as an antitumor target of synthetic curcuminoids in colorectal cancer 2017
    2017 The effect of perioperative fluid management on postoperative ileus in rectal cancer patients 2017
    2017 Preoperative blood transfusion is a predictor of worse short-term postoperative outcomes after colectomy 2017
    2017 Value of MDCT and Clinical and Laboratory Data for Predicting the Need for Surgical Intervention in Suspected Small-Bowel Obstruction. 2017
    2017 Incorporation of Leadership Rounds in CAUTI Prevention Efforts 2017
    2016 Multiple postoperative complications: Making sense of the trajectories 2016
    2016 Hot Topics in Colorectal Surgery 2016
    2016 Postoperative Complications: Looking Forward to a Safer Future 2016
    2016 Preoperative urinary tract infection increases postoperative morbidity 2016
    2016 Strategies to Reduce Postoperative Urinary Tract Infections 2016
    2016 The aryl hydrocarbon receptor is a repressor of inflammation-associated colorectal tumorigenesis in mouse 2016
    2016 Postacute care after major abdominal surgery in elderly patients intersection of age, functional status, and postoperative complications 2016
    2016 Indole-3-carbinol induces tumor cell death: Function follows form 2016
    2016 National Trends in Short-term Outcomes Following Non-emergent Surgery for Diverticular Disease 2016
    2016 Short-term outcomes of minimally invasive versus open colectomy for colon cancer 2016
    2016 Independent risk factors for prolonged postoperative ileus development 2016
    2016 The log odds of positive elymph nodes stratifies and predicts survival of high-risk individuals among stage III rectal cancer patients 2016
    2016 Intestinal inflammation and the diet: Is food friend or foe? 2016
    2016 Process improvement in surgery 2016
    2016 Aryl hydrocarbon receptor-dependent apoptotic cell death induced by the flavonoid chrysin in human colorectal cancer cells 2016
    2016 Does anastomotic leak contribute to high failure-to-rescue rates? 2016
    2016 Implications of multiple complications on the postoperative recovery of general surgery patients 2016
    2016 Modeling the Temporal Evolution of Postoperative Complications 2016
    2016 Urinary tract infection after surgery for colorectal malignancy: Risk factors and complications Presented as a podium presentation at the 2015 Academic Surgical Congress, March 2, 2015 to May 2, 2015, Las Vegas, Nevada. 2016
    2015 Postoperative Ileus—More than Just Prolonged Length of Stay? 2015
    2015 Is There a Relationship Between Patient Satisfaction and Favorable Surgical Outcomes? 2015
    2015 Characterizing Readmission in Ulcerative Colitis Patients Undergoing Restorative Proctocolectomy 2015
    2015 Development of a list of high-risk operations for patients 65 years and older 2015
    2015 Nomogram to predict postoperative readmission in patients who undergo general surgery 2015
    2015 Patient satisfaction: Does surgical volume matter? 2015
    2015 Some important deficiencies in the development, validation, and reporting of a prediction model [2] 2015
    2015 Variation reduction to reduce readmission: A figment of imagination or reality of the future? 2015
    2014 Can patients reliably identify safe, high quality care? 2014
    2014 Preoperative impairment is associated with a higher postdischarge level of care 2014
    2014 Readmission after delayed diagnosis of surgical site infection: a focus on prevention using the American College of Surgeons National Surgical Quality Improvement Program. 2014
    2014 Catheter-associated urinary tract infection: a successful prevention effort employing a multipronged initiative at an academic medical center. 2014
    2014 Carpet lesions detected at CT colonography: Clinical, imaging, and pathologic features 2014
    2014 Response. 2014
    2014 A composite index for predicting readmission following emergency general surgery 2014
    2014 Advancing quality measurement to include the patient perspective 2014
    2014 Is there a relationship between patient satisfaction and favorable outcomes? 2014
    2014 Liver tumor promotion by 2,3,7,8-tetrachlorodibenzo-p-dioxin is dependent on the aryl hydrocarbon receptor and TNF/IL-1 receptors 2014
    2014 Multiple complications and short length of stay are associated with postoperative readmissions 2014
    2014 Overview: Getting involved in research as a busy practicing surgeon 2014
    2014 Postdischarge complications are an important predictor of postoperative readmissions 2014
    2013 Postoperative complications in patients with rectal cancer are associated with delays in chemotherapy that lead to worse disease-free and overall survival 2013
    2013 Postoperative complications and implications on patient-centered outcomes 2013
    2013 Predictors of mortality after emergent surgery for acute colonic diverticulitis: Analysis of National Surgical Quality Improvement Project data 2013
    2013 Failure of a constrained acetabular liner without reinforcement ring disruption. 2013
    2012 Comparable postoperative morbidity and mortality after laparoscopic and open emergent restorative colectomy: Outcomes from the ACS NSQIP 2012
    2012 SU5416, a VEGF Receptor Inhibitor and Ligand of the AHR, Represents a New Alternative for Immunomodulation 2012
    2012 Identification of the Ah-receptor structural determinants for ligand preferences 2012
    2012 Utility of micro-ribonucleic acid profile for predicting recurrence of rectal cancer 2012
    2012 Assessment of screening colonoscopy competency in colon and rectal surgery fellows: A single institution experience 2012
    2012 Visceral obesity is associated with outcomes of total mesorectal excision for rectal adenocarcinoma 2012
    2012 AHR drives the development of gut ILC22 cells and postnatal lymphoid tissues via pathways dependent on and independent of Notch 2012
    2012 Surgical genomics: Using new technology to answer age-old questions 2012
    2011 Mortality by stage for right- versus left-sided colon cancer: analysis of surveillance, epidemiology, and end results--Medicare data. 2011
    2011 Small bowel obstruction following restorative proctocolectomy: affected by a laparoscopic approach? 2011
    2011 Short-term outcomes after laparoscopic-assisted proctectomy for rectal cancer: Results from the ACS NSQIP 2011
    2011 Optimizing surgical care of colon cancer in the older adult population 2011
    2011 Management of stage IV rectal cancer: Palliative options 2011
    2011 Pediatric diabetes registries: When baby steps are not enough 2011
    2010 Aryl hydrocarbon receptor nuclear translocator in hepatocytes is required for aryl hydrocarbon receptor-mediated adaptive and toxic responses in liver 2010
    2010 Rapamycin inhibits anal carcinogenesis in two preclinical animal models 2010
    2010 The aryl hydrocarbon receptor-interacting protein (AIP) is required for dioxin-induced hepatotoxicity but not for the induction of the Cyp1a1 and Cyp1a2 genes 2010
    2010 Synthesis of hexa(methyl/phenyl) substituted pyrazolines and thermolysis to hexasubstituted cyclopropanes 2010
    2010 Body mass index does not affect postoperative morbidity and oncologic outcomes of total mesorectal excision for rectal adenocarcinoma 2010
    2010 Portal vein thrombus after pediatric proctocolectomy with ileoanal anastomosis 2010
    2010 The diagnosis of diverticulitis in outpatients: on what evidence? 2010
    2010 Laparoscopy Improves Short-term Outcomes After Surgery for Diverticular Disease 2010
    2010 Study of stress intensity factor of a cracked steel plate with a single-side CFRP composite patching 2010
    2009 Routine evaluation of the distal colon remnant before Hartmann's reversal is not necessary in asymptomatic patients 2009
    2009 Should total number of lymph nodes be used as a quality of care measure for stage III colon cancer? 2009
    2009 Colonoscopic findings and tumor site do not predict bowel obstruction during medical treatment of stage IV colorectal cancer 2009
    2009 Laparoscopy decreases postoperative complication rates after abdominal colectomy: Results from the national surgical quality improvement program 2009
    2008 Laparoscopic restorative proctocolectomy with ileal S-pouch. 2008
    2008 Routine ileal intubation during screening colonoscopy: a useful maneuver? 2008
    2007 Radiation colitis and proctitis 2007
    2003 Epstein-Barr virus provides a survival factor to Burkitt's lymphomas. 2003
    2003 EBNA-1, a bifunctional transcriptional activator 2003
    2001 Effect of vascular occlusion on radiofrequency ablation of the liver: Results in a porcine model 2001
    1999 Metastatic breast cancer 1999
    Abdominal Multidetector Computed Tomography for Suspected Small-Bowel Obstruction: Multireader Study Comparing Radiologist Performance for Predicting Surgical Outcomes.


    Year Title Altmetric
    2003 Virus-based vectors for gene expression in mammalian cells: Epstein-Barr virus.  Ed. 38.  2003


    Year Title Altmetric
    2016 Anal fissure.  497-503. 2016
    2016 Cryptoglandular disease.  463-482. 2016
    2016 Hemorrhoids.  505-519. 2016
    2016 Pilonidal disease.  483-496. 2016
    2015 Palliative options in patients with stage 4 rectal cancer.  367-384. 2015
    2010 Cryptoglandular disease.  195-206. 2010
    2010 Hemorrhoids.  217-224. 2010
    2010 Lateral internal sphincterotomy.  189-193. 2010
    2010 Pilonidal operations.  207-215. 2010

    Research Overview

  • colon cancer, rectal cancer, anal cancer, inflammatory bowel disease, benign conditions of colon, rectum and anus, endoscopic treatment of colonic disease, chemoprevention
  • Education And Training

  • University of Wisconsin Surgery, Chief Resident 2006
  • University of Wisconsin-Madison Oncology, Postdoctoral Research 2003
  • Mayo Clinic, Rochester Colon and Rectal Surgery, Residency 2007
  • University of Wisconsin-Madison Surgery, Residency 2006
  • University of Wisconsin, Residency 1998
  • Full Name

  • Gregory Kennedy