Publications Print Sassun R, Sileo A, Ng JC, Ferrari D, McKenna NP, Perry WRG, Larson DW. A 22-year experience of surgical management of anorectal melanoma: risk factors for recurrence and death. Int J Colorectal Dis. 2025 Apr 22; 40 (1):99 View PubMed Reynolds IS, Gleason L, Hajjar R, Khan S, Sanchez E, Bews KA, Martinez-Jorge J, Perry WR, Mathis KL, McKenna NP. Perineal wound complications after proctectomy for Crohn's disease: the impact of the omental pedicle flap and predictors of return to the operating room. J Gastrointest Surg. 2025 Apr 3; 29 (6):102048 Epub 2025 Apr 03 View PubMed Sileo A, Sassun R, Ng JC, Aboelmaaty S, Gomaa IA, Mari G, McKenna NP, Rumer KK, Mathis KL, Larson DW. ASO Visual Abstract: Age Matters: Early-Onset Rectal Cancer Exhibits Higher Rates of Pathological Complete Response : A Retrospective Analysis of the Influence of Young Age on Treatment Success in Stage II-III Rectal Cancer. Ann Surg Oncol. 2025 Apr; 32 (4):2320-2321 View PubMed Sileo A, Sassun R, Ng JC, Aboelmaaty S, Gomaa IA, Mari G, McKenna NP, Rumer KK, Mathis KL, Larson DW. Age Matters: Early-Onset Rectal Cancer Exhibits Higher Rates of Pathological Complete Response: A Retrospective Analysis of the Influence of Young Age on Treatment Success in Stage II-III Rectal Cancer. Ann Surg Oncol. 2025 Apr; 32 (4):2302-2307 Epub 2025 Jan 09 View PubMed Mirande MD, Bews KA, Brady JT, Colibaseanu DT, Shawki SF, Perry WR, Behm KT, Mathis KL, McKenna NP. Does timing of ileostomy closure impact postoperative morbidity? Colorectal Dis. 2025 Apr; 27 (4):e70088 View PubMed Reynolds IS, McKenna NP, Mathis KL, Perry WR. International surgical fellowships in the USA: the pathway to success. Ir J Med Sci. 2025 Mar 17 [Epub ahead of print] View PubMed Sassun R, Sileo A, Ng JC, Violante T, Gomaa I, Mandrekar J, Rumer KK, McKenna NP, Larson DW. Validated Integration of Tumor Deposits in N Staging for Prognostication in Colon Cancer. JAMA Surg. 2025 Feb 5 Epub 2025 Feb 05 View PubMed Sassun R, Sileo A, Gomaa IA, Aboelmaaty S, McKenna NP, Rumer KK, Mathis KL, Larson DW. Reducing the positive margins rate for anal melanoma in the modern era: a national propensity score matched study. Updates Surg. 2025 Jan; 77 (1):133-137 Epub 2024 Dec 26 View PubMed Garfinkle R, Bews KA, Perry WRG, Behm KT, Cima RR, Mathis KL, McKenna NP. Postoperative bowel dysfunction in patients with rectal cancer - Does a minimally invasive surgical approach improve outcomes? Eur J Surg Oncol. 2024 Dec; 50 (12):108661 Epub 2024 Sept 03 View PubMed Dunleavy KA, Santiago P, Forde G, Harmsen WS, McKenna NP, Coelho-Prabhu N, Shawki S, Raffals L. Total Proctocolectomy vs Subtotal/total Colectomy for Neoplasia in Patients With Inflammatory Bowel Disease and Primary Sclerosing Cholangitis. Inflamm Bowel Dis. 2024 Nov 4; 30 (11):1935-1945 View PubMed McKenna NP, Mirande MD, Bews KA, Dozois EJ, Kelley SR, Mathis KL. Does Operating Volume On-Call Vary by Surgeon? Analysis of On-Call Cases in an Academic Colorectal Practice. Am Surg. 2024 Nov; 90 (11):3144-3147 Epub 2024 June 13 View PubMed Sassun R, Larson DW, Bews KA, Kelley SR, Mathis KL, Habermann EB, McKenna NP. When Is Diversion Indicated After Right-Sided Colon Resections? J Surg Res. 2024 Nov; 303:361-370 Epub 2024 Oct 15 View PubMed Sassun R, Sileo A, Ng JC, Violante T, Gomaa IA, Block MS, Perry WRG, McKenna NP, Rumer KK, Larson DW. Neoadjuvant immunotherapy versus adjuvant chemotherapy in anorectal melanoma. Br J Surg. 2024 Oct 30; 111 (11) View PubMed Ferrari D, Violante T, Day CN, McKenna NP, Mathis KL, Dozois EJ, Larson DW. Unveiling the Hidden Consequences: Initial Impact of COVID-19 on Colorectal Cancer Operation. J Am Coll Surg. 2024 Aug 1; 239 (2):85-97 Epub 2024 July 17 View PubMed Peponis T, Ubl DS, Habermann EB, Abarca Rendon FM, McKenna NP, Ofshteyn A, Mathis KL, Colibaseanu DT, Kelley SR. Trends and Distribution of IPAAs in the United States: Becoming Harder to Find in Colon and Rectal Surgery Residency Training? Dis Colon Rectum. 2024 Aug 1; 67 (8):1040-1047 Epub 2024 May 03 View PubMed Garfinkle RC, McKenna NP. Low Anterior Resection Syndrome following Restorative Proctectomy for Rectal Cancer: Can the Surgeon Have Any Meaningful Impact? Cancers (Basel). 2024 Jun 24; 16 (13) Epub 2024 June 24 View PubMed Mirande MD, McKenna NP, Sample JW, Bews KA, Brady JT, Colibaseanu DT, Kelley SR. Surgical site infections at prior stoma site after colostomy closure: a multi-institutional analysis. J Gastrointest Surg 2024 Jun; 28 (6):936-938 Epub 2024 Mar 05 View PubMed McKenna NP, Bews KA, Mirande MD, Abarca Rendon FM, Ofshteyn A, Peponis T, Shawki SF, Kelley SR, Mathis KL. Surgical management of duodenal crohn's disease. Langenbecks Arch Surg. 2024 Apr 19; 409 (1):132 View PubMed McKenna NP, Bews KA, Behm KT, Mathis KL, Cima RR, Habermann EB. Timing and Location of Venous Thromboembolisms After Surgery for Inflammatory Bowel Disease. J Surg Res. 2024 Apr; 296:563-570 Epub 2024 Feb 09 View PubMed Mirande MD, McKenna NP, Bews KA, Shawki SF, Cima RR, Brady JT, Colibaseanu DT, Mathis KL, Kelley SR. Risk factors for surgical site infections and trends in skin closure technique after diverting loop ileostomy reversal: A multi-institutional analysis. Am J Surg. 2023 Nov; 226 (5):703-708 Epub 2023 Aug 03 View PubMed McKenna NP, Bews KA, Behm KT, Habermann EB, Cima RR. Postoperative Venous Thromboembolism in Colon and Rectal Cancer: Do Tumor Location and Operation Matter? J Am Coll Surg. 2023 Apr 1; 236 (4):658-665 Epub 2023 Jan 09 View PubMed McKenna NP, Kelley SR, Bews KA, Behm KT, Mathis KL. Surgical Management of Enterovesical Fistula in Crohn's Disease in the Biologic Era. Inflamm Bowel Dis. 2023 Mar 1; 29 (3):480-482 View PubMed McKenna NP, Glasgow AE, Shariq OA, Larson DW, Ghanem OM, McKenzie TJ, Habermann EB. Challenging surgical dogma: are routine postoperative day 1 laboratory tests necessary after bariatric operations? Surg Obes Relat Dis. 2022 Nov; 18 (11):1261-1268 Epub 2022 Aug 06 View PubMed McKenna NP, Bews KA, Cima RR, Crowson CS, Habermann EB. Validation of a left-sided colectomy anastomotic leak risk score and assessment of diversion practices. Am J Surg. 2022 Sep; 224 (3):971-978 Epub 2022 Apr 22 View PubMed Abd El Aziz MA, McKenna NP, Jakub JW, Hallemeier CL, Kelley SR, Jin Z, Mathis KL. Rectal cancer with synchronous inguinal lymph node metastasis without distant metastasis. A call for further oncological evaluation. Eur J Surg Oncol. 2022 May; 48 (5):1100-1103 Epub 2021 Dec 20 View PubMed McKenna NP, Bews KA, Yost KJ, Cima RR, Habermann EB. Bowel Dysfunction after Low Anterior Resection for Colorectal Cancer: A Frequent Late Effect of Surgery Infrequently Treated. J Am Coll Surg. 2022 Apr 1; 234 (4):529-537 View PubMed McKenna NP, Habermann EB, Glasgow AE, Cima RR. Tradition Versus Value: Is There Utility in Protocolized Postoperative Laboratory Testing After Elective Colorectal Surgery? Ann Surg. 2021 Dec 1; 274 (6):e548-e553 View PubMed McKenna NP, Glasgow AE, Behm KT, Habermann EB, Cima RR. Is there Clinical Value to Routine Postoperative Day 1 Labs after Proctectomy? J Gastrointest Surg. 2021 Nov; 25 (11):2961-2962 Epub 2021 May 04 View PubMed Hebert BR, McKenna NP, Mathis KL. Colectomy in the Setting of Cytomegalovirus Infection: Non-Restorative Initially. J Gastrointest Surg. 2021 Oct; 25 (10):2684-2685 Epub 2021 Apr 09 View PubMed Sakata S, McKenna NP, Allawi A, D'Angelo AD, Chua HK, Dozois EJ. How to do an Altemeier perineal rectosigmoidectomy for full-thickness rectal prolapse. ANZ J Surg. 2021 May; 91 (5):1019-1020 Epub 2021 Jan 18 View PubMed Shariq OA, Bews KA, McKenna NP, Dy BM, Lyden ML, Farley DR, Thompson GB, McKenzie TJ, Habermann EB. Is same-day discharge associated with increased 30-day postoperative complications and readmissions in patients undergoing laparoscopic adrenalectomy? Surgery. 2021 Feb; 169 (2):289-297 Epub 2020 Sept 30 View PubMed McKenna NP, Bews KA, Colibaseanu DT, Mathis KL, Nelson H, Habermann EB. The intersection of tumor location and combined bowel preparation: Utilization differs but anastomotic leak risk reduction does not. J Surg Oncol. 2021 Jan; 123 (1):261-270 Epub 2020 Oct 01 View PubMed McKenna NP, Bews KA, Shariq OA, Habermann EB, Behm KT, Kelley SR, Larson DW. Is Same-Day and Next-Day Discharge After Laparoscopic Colectomy Reasonable in Select Patients? Dis Colon Rectum. 2020 Oct; 63 (10):1427-1435 View PubMed Alsughayer A, Grass F, McKenna NP, Petersen M, Mathis KL, Lightner AL. Does IBD Portend Worse Outcomes in Patients with Rectal Cancer? A Case-Matched Analysis. Dis Colon Rectum. 2020 Sep; 63 (9):1265-1275 View PubMed Traynor MD Jr, McKenna NP, Habermann EB, Antiel RM, Moir CR, Klinkner DB, Ishitani MB, Potter DD Jr. Pouchogram Prior to Ileostomy Reversal after Ileal Pouch-Anal Anastomosis in Pediatric Patients: Is it Useful in the Setting of Routine EUA? J Pediatr Surg. 2020 Aug; 55 (8):1499-1502 Epub 2019 Oct 26 View PubMed McKenna NP, Habermann EB, Larson DW, Kelley SR, Mathis KL. A 25 year experience of perineal hernia repair. Hernia. 2020 Apr; 24 (2):273-278 Epub 2019 May 02 View PubMed McKenna NP, Bews KA, Habermann EB, Dozois EJ, Lightner AL, Mathis KL. What Factors Are Associated With the Eventual Need for an Ileostomy After Total Abdominal Colectomy and Ileosigmoid or Ileorectal Anastomosis for Crohn's Colitis in the Biologic Era? Dis Colon Rectum. 2020 Apr; 63 (4):504-513 View PubMed McKenna NP, Bews KA, Al-Refaie WB, Colibaseanu DT, Pemberton JH, Cima RR, Habermann EB. Assessing Malnutrition Before Major Oncologic Surgery: One Size Does Not Fit All. J Am Coll Surg. 2020 Apr; 230 (4):451-460 Epub 2020 Feb 26 View PubMed McKenna NP, Habermann EB, Sada A, Kellogg TA, McKenzie TJ. Is Bariatric Surgery Safe and Effective in Patients with Inflammatory Bowel Disease? Obes Surg. 2020 Mar; 30 (3):882-888 View PubMed Traynor MD Jr, McKenna NP, Potter DD Jr, Moir CR, Klinkner DB. The effect of diversion on readmission following ileal pouch-anal anastomosis in children. J Pediatr Surg. 2020 Mar; 55 (3):549-553 Epub 2019 Nov 20 View PubMed McKenna NP, Bews KA, Behm KT, Mathis KL, Lightner AL, Habermann EB. Do Patients With Inflammatory Bowel Disease Have a Higher Postoperative Risk of Venous Thromboembolism or Do They Undergo More High-risk Operations? Ann Surg. 2020 Feb; 271 (2):325-331 View PubMed McKenna NP, Bews KA, Cima RR, Crowson CS, Habermann EB. Development of a Risk Score to Predict Anastomotic Leak After Left-Sided Colectomy: Which Patients Warrant Diversion? J Gastrointest Surg. 2020 Jan; 24 (1):132-143 Epub 2019 June 26 View PubMed McKenna NP. Low Anterior Resection Syndrome. Dis Colon Rectum. 2019 Dec; 62 (12):1420-1422 View PubMed McKenna NP, Lightner AL. Preoperative Considerations in Inflammatory Bowel Disease. Surg Clin North Am. 2019 Dec; 99 (6):1083-1094 Epub 2019 Sept 11 View PubMed McKenna NP, Lightner AL, Habermann EB, Mathis KL. Hemorrhoidectomy and Excision of Skin Tags in IBD: Harbinger of Doom or Simply a Disease Running Its Course? Dis Colon Rectum. 2019 Dec; 62 (12):1505-1511 View PubMed Lightner AL, McKenna NP, Alsughayer A, Harmsen WS, Taparra K, Parker ME, Raffals LE, Loftus EV Jr. Biologics and 30-Day Postoperative Complications After Abdominal Operations for Crohn's Disease: Are There Differences in the Safety Profiles? Dis Colon Rectum. 2019 Nov; 62 (11):1352-1362 View PubMed Lightner AL, McKenna NP, Alsughayer A, Loftus EV Jr, Raffals LE, Faubion WA, Moir C. Anti-TNF biologic therapy does not increase postoperative morbidity in pediatric Crohn's patients. J Pediatr Surg. 2019 Oct; 54 (10):2162-2165 Epub 2019 Jan 18 View PubMed McKenna NP, Habermann EB, Zielinski MD, Lightner AL, Mathis KL. Body mass index: Implications on disease severity and postoperative complications in patients with Crohn's disease undergoing abdominal surgery. Surgery. 2019 Oct; 166 (4):703-708 Epub 2019 June 28 View PubMed Traynor MD Jr, McKenna NP, Habermann EB, Yonkus J, Moir CR, Potter DD Jr, Ishitani MB, Klinkner DB. Utilization of Maneuvers to Increase Mesenteric Length Employed in Children Undergoing Ileal Pouch-Anal Anastomosis. J Laparoendosc Adv Surg Tech A. 2019 Oct; 29(10):1285-1291. Epub 2019 Aug 29. View PubMed McKenna NP, Bews KA, Shariq OA, Habermann EB, Cima RR, Lightner AL. Incision & drainage of perianal sepsis in the immunocompromised: A need for heightened postoperative awareness. Am J Surg. 2019 Sep; 218 (3):507-513 Epub 2019 Jan 31 View PubMed McKenna NP, Bews KA, Mathis KL, Lightner AL, Habermann EB. Surgery During Admission for an Ulcerative Colitis Flare: Should Pouch Formation Be Considered? J Surg Res. 2019 Jul; 239:216-223 Epub 2019 Mar 07 View PubMed Shariq OA, Hanson KT, McKenna NP, Kelley SR, Dozois EJ, Lightner AL, Mathis KL, Habermann EB. Does Metabolic Syndrome Increase the Risk of Postoperative Complications in Patients Undergoing Colorectal Cancer Surgery? Dis Colon Rectum. 2019 Jul; 62 (7):849-858 View PubMed Lightner AL, Alsughayer A, Wang Z, McKenna NP, Seisa MO, Moir C. Short- and Long-term Outcomes After Ileal Pouch Anal Anastomosis in Pediatric Patients: A Systematic Review. Inflamm Bowel Dis. 2019 Jun 18; 25 (7):1152-1168 View PubMed McKenna NP, Bergquist JR, Habermann EB, Chua HK, Kelley SR, Mathis KL. Surgery and chemotherapy are associated with improved overall survival in anal adenocarcinoma: results of a national cohort study. Int J Colorectal Dis. 2019 Apr; 34 (4):607-612 Epub 2019 Jan 11 View PubMed Hernandez MC, Finnesgard EJ, Anderson JR, McKenna NP, Zielinski MD, Aho JM. Injury patterns and mechanisms related to refrigerator and freezer utilization in the United States. Am J Emerg Med. 2019 Apr; 37 (4):627-631 Epub 2018 June 26 View PubMed Lightner AL, Grass F, McKenna NP, Tilman M, Alsughayer A, Kelley SR, Behm K, Merchea A, Larson DW. Short-term postoperative outcomes following robotic versus laparoscopic ileal pouch-anal anastomosis are equivalent. Tech Coloproctol. 2019 Mar; 23 (3):259-266 Epub 2019 Apr 02 View PubMed Lightner AL, Spinelli A, McKenna NP, Hallemeier CL, Fleshner P. Does external beam radiation therapy to the pelvis portend worse ileal pouch outcomes? An international multi-institution collaborative study. Colorectal Dis. 2019 Feb; 21 (2):219-225 Epub 2018 Dec 01 View PubMed McKenna NP, Potter DD, Bews KA, Glasgow AE, Mathis KL, Habermann EB. Ileal-pouch anal anastomosis in pediatric NSQIP: Does a laparoscopic approach reduce complications and length of stay? J Pediatr Surg. 2019 Jan; 54 (1):112-117 Epub 2018 Oct 05 View PubMed Lightner AL, Edward V Loftus Jr Loftus, Loftus EV, McKenna NP, Raffals LE. Vedolizumab in the Perioperative Management of Inflammatory Bowel Disease. Curr Drug Targets. 2019; 20 (13):1317-1322 View PubMed McKenna NP, Habermann EB, Glasgow AE, Dozois EJ, Lightner AL. Intra-abdominal Sepsis After Ileocolic Resection in Crohn's Disease: The Role of Combination Immunosuppression. Dis Colon Rectum. 2018 Dec; 61 (12):1393-1402 View PubMed McKenna NP, Glasgow AE, Cima RR, Habermann EB. Risk factors for organ space infection after ileal pouch anal anastomosis for chronic ulcerative colitis: An ACS NSQIP analysis. Am J Surg. 2018 Nov; 216 (5):900-905 Epub 2018 Mar 06 View PubMed McKenna NP, Habermann EB, Glasgow AE, Mathis KL, Lightner AL. Risk factors for readmission following ileal pouch-Anal anastomosis: an American College of Surgeons National Surgical Quality Improvement Program analysis. J Surg Res. 2018 Sep; 229:324-331 Epub 2018 May 10 View PubMed McKenna NP, Mathis KL, Pemberton JH, Lightner AL. The Impact of Age at Time of Ileal Pouch Anal Anastomosis on Short and Long-Term Outcomes in Adults. Inflamm Bowel Dis. 2018 Jul 12; 24 (8):1857-1865 View PubMed McKenna NP, Dozois EJ, Pemberton JH, Lightner AL. Impact of sex on 30-day complications and long-term functional outcomes following ileal pouch-anal anastomosis for chronic ulcerative colitis. Int J Colorectal Dis. 2018 May; 33 (5):619-625 Epub 2018 Mar 16 View PubMed Law CCY, Narula A, Lightner AL, McKenna NP, Colombel JF, Narula N. Systematic Review and Meta-Analysis: Preoperative Vedolizumab Treatment and Postoperative Complications in Patients with Inflammatory Bowel Disease. J Crohns Colitis. 2018 Apr 27; 12 (5):538-545 View PubMed Lightner AL, McKenna NP, Tse CS, Hyman N, Smith R, Ovsepyan G, Fleshner P, Crowell K, Koltun W, Ferrante M, D'Hoore A, Lauwers N, Verstockt B, Spinelli A, DiCandido F, Raffals LE, Mathis KL, Loftus EV Jr. Postoperative Outcomes in Ustekinumab-Treated Patients Undergoing Abdominal Operations for Crohn's Disease. J Crohns Colitis. 2018 Mar 28; 12 (4):402-407 View PubMed Lightner AL, McKenna NP, Tse CS, Raffals LE, Loftus EV Jr, Mathis KL. Postoperative outcomes in vedolizumab-treated Crohn's disease patients undergoing major abdominal operations. Aliment Pharmacol Ther. 2018 Mar; 47 (5):573-580 Epub 2017 Dec 18 View PubMed Kotze PG, Ma C, Mckenna N, Almutairdi A, Kaplan GG, Raffals LE, Loftus EV Jr, Panaccione R, Lightner AL. Vedolizumab and early postoperative complications in nonintestinal surgery: a case-matched analysis. Therap Adv Gastroenterol. 2018; 11:1756284818783614 Epub 2018 June 21 View PubMed McKenna NP, Habermann EB, Glasgow AE, Mathis KL, Lightner AL. Risk factors for readmission following ileal pouch–anal anastomosis: an American College of Surgeons National Surgical Quality Improvement Program analysis Journal of Surgical Research. 2018; 229:324-31 Lightner AL, McKenna NP, Moncrief S, Pemberton JH, Raffals LE, Mathis KL. Surgical Outcomes in Vedolizumab-Treated Patients with Ulcerative Colitis. Inflamm Bowel Dis. 2017 Dec; 23 (12):2197-2201 View PubMed McKenna NP, Mathis KL, Khasawneh MA, Dozois EJ, Larson DW, Pemberton JH, Lightner AL. Obese Patients Undergoing Ileal Pouch-Anal Anastomosis: Short-and Long-term Surgical Outcomes. Inflamm Bowel Dis. 2017 Dec; 23 (12):2142-2146 View PubMed McKenna NP, Mathis KL, Khasawneh M, Shariq O, Dozois EJ, Larson DW, Lightner AL. Thirty-Day Hospital Readmission After Restorative Proctocolectomy and Ileal Pouch Anal Anastomosis for Chronic Ulcerative Colitis at a High-Volume Center. J Gastrointest Surg. 2017 Nov; 21 (11):1859-1864 Epub 2017 Aug 24 View PubMed McKenna NP, Behm KT, Ubl DS, Glasgow AE, Mathis KL, Pemberton JH, Habermann EB, Cima RR. Analysis of Postoperative Venous Thromboembolism in Patients With Chronic Ulcerative Colitis: Is It the Disease or the Operation? Dis Colon Rectum. 2017 Jul; 60 (7):714-722 View PubMed Khasawneh MA, McKenna NP, Abdelsattar ZM, Johnson A, Dozois EJ, Pemberton JH, Mathis KL. Impact of BMI on Ability to Successfully Create an IPAA. Dis Colon Rectum. 2016 Nov; 59 (11):1034-1038 View PubMed Huang J, McKenna N, Babins N. Utility of thromboelastography during neuraxial blockade in the parturient with thrombocytopenia. AANA J. 2014 Apr; 82 (2):127-30 View PubMed Wang JC, Spiegel N, Bertelsen S, Le N, McKenna N, Budde JP, Harari O, Kapoor M, Brooks A, Hancock D, Tischfield J, Foroud T, Bierut LJ, Steinbach JH, Edenberg HJ, Traynor BJ, Goate AM. Cis-regulatory variants affect CHRNA5 mRNA expression in populations of African and European ancestry. PLoS One. 2013; 8 (11):e80204 Epub 2013 Nov 26 View PubMed Lin P, Hartz SM, Wang JC, Agrawal A, Zhang TX, McKenna N, Bucholz K, Brooks AI, Tischfield JA, Edenberg HJ, Hesselbrock VM, Kramer JR, Kuperman S, Schuckit MA, Goate AM, Bierut LJ, Rice JP, COGA Collaborators//COGEND Collaborators, GENEVA. Copy number variations in 6q14.1 and 5q13.2 are associated with alcohol dependence. Alcohol Clin Exp Res. 2012 Sep; 36 (9):1512-8 Epub 2012 June 15 View PubMed PST-20554904 Home Publications