Medical College of Wisconsin
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Timothy J. Ridolfi MS, MD

Timothy J. Ridolfi MS, MD profile photo picture

Professor

Institution: Medical College of Wisconsin
Department: Surgery
Division: Surgery Colorectal

View Curriculum Vitae

Publications (62)

  • Anal Cancer Screening Prevalence in U.S. Cities and Factors Associated With Screening. (Nyitray AG, Walsh JL, Deshmukh AA, Chiao EY, Brzezinski B, Ridolfi TJ, Lundeen S, Nitkowski J, Hazra A) Am J Prev Med 2026 Apr 09;71(3):108373 PMID: 41966460 PMCID: PMC13182953 SCOPUS ID: 2-s2.0-105039687772 04/12/2026    
  • Postoperative venous thromboembolism after colon and rectal surgery (Holland HK, Ridolfi TJ) Seminars in Colon and Rectal Surgery March 2026;37(1) SCOPUS ID: 2-s2.0-105026792739 03/01/2026    
  • Cost-Effectiveness of Home-Based Self-Sampling vs Clinician Sampling for Anal Precancer Screening. (Damgacioglu H, McAuliffe TL, Ridolfi TJ, Chiao E, Fernandez ME, Schick V, Smith JS, Brzezinski B, Nitkowski J, Deshmukh AA, Nyitray AG) JAMA Netw Open 2026 Jan 02;9(1):e2552220 PMID: 41490106 PMCID: PMC12771244 SCOPUS ID: 2-s2.0-105026639265 01/06/2026       1 Citation
  • Examining the cost of childcare in general surgery training. (Wilson DJ, Drezdzon MK, Ridolfi TJ, Hu KY, Peterson CY, Ludwig KA, Calata JF) Am J Surg 2025 Dec;250:116496 PMID: 40571466 SCOPUS ID: 2-s2.0-105009065769 06/27/2025       4 Citations
  • Factors associated with decreased anal sphincter tone and the accuracy of forced anal examinations to detect individuals having receptive anal intercourse: an observational study. (Nyitray AG, Rosser BRS, Hazra A, Nitkowski J, Smith D, Brzezinski B, Ridolfi TJ, Schneider JA, Chiao EY, Sanos S, Mkonyi E, Mgopa L, Ross MW) BMJ Public Health 2024 Jun;2(1):e001039 PMID: 40018098 PMCID: PMC11812914 02/28/2025    
  • Bowel function and quality-of-life outcomes in locally advanced rectal cancer: watch-and-wait vs total mesorectal excision. (Parikh TN, Peterson KJ, Brazauskas R, Calata JF, Peterson CY, Ludwig KA, Ridolfi TJ) J Gastrointest Surg 2025 Mar;29(3):101972 PMID: 39842769 SCOPUS ID: 2-s2.0-85216632412 01/23/2025    
  • Engagement and Factors Associated With Annual Anal Human Papillomavirus Screening Among Sexual and Gender Minority Individuals. (Nitkowski J, Ridolfi TJ, Lundeen SJ, Giuliano AR, Chiao E, Fernandez ME, Schick V, Smith JS, Bruggink P, Brzezinski B, Nyitray AG) Sex Transm Dis 2025 Feb 01;52(2):94-101 PMID: 39316041 PMCID: PMC11711006 SCOPUS ID: 2-s2.0-85205295776 09/24/2024       2 Citations
  • Traveling Long Distances for Rectal Cancer Care: Institutional Outcomes and Patient Experiences. (Peterson KJ, Drezdzon MK, Sparapani R, Calata JF, Ridolfi TJ, Ludwig KA, Peterson CY) J Surg Res 2024 Oct;302:916-924 PMID: 39265279 SCOPUS ID: 2-s2.0-85203426182 09/13/2024       3 Citations
  • Engagement and factors associated with annual anal human papillomavirus screening among sexual and gender minority individuals. (Nitkowski J, Ridolfi TJ, Lundeen SJ, Giuliano AR, Chiao E, Fernandez ME, Schick V, Smith JS, Bruggink P, Brzezinski B, Nyitray AG) medRxiv 2024 Apr 22 PMID: 38712301 PMCID: PMC11071571 05/07/2024    
  • The influence of home versus clinic anal human papillomavirus sampling on high-resolution anoscopy uptake in the Prevent Anal Cancer Self-Swab Study. (Nitkowski J, Ridolfi TJ, Lundeen SJ, Giuliano AR, Chiao EY, Fernandez ME, Schick V, Smith JS, Brzezinski B, Nyitray AG) Sex Health 2024 Apr;21 PMID: 38683939 PMCID: PMC11752474 SCOPUS ID: 2-s2.0-85191911442 04/29/2024       1 Citation
  • Factors associated with decreased anal sphincter tone and the accuracy of forced anal examinations to detect individuals having receptive anal intercourse: An observational study. (Nyitray AG, Rosser BRS, Hazra A, Nitkowski J, Smith D, Brzezinski B, Ridolfi TJ, Schneider JA, Chiao EY, Sanos S, Mkonyi E, Mgopa LR, Ross MW) medRxiv 2024 Feb 01 PMID: 38352524 PMCID: PMC10862988 02/14/2024    
  • The influence of home versus clinic anal human papillomavirus sampling on high-resolution anoscopy uptake in the Prevent Anal Cancer Self-Swab Study. (Nitkowski J, Ridolfi TJ, Lundeen SJ, Giuliano AR, Chiao E, Fernandez ME, Schick V, Smith JS, Brzezinski B, Nyitray AG) medRxiv 2023 Dec 29 PMID: 38234718 PMCID: PMC10793519 01/18/2024    
  • HPV Vaccine against Anal HPV Infection and Anal Intraepithelial Neoplasia (Ridolfi TJ, Ludwig KA) 50 Landmark Papers Every Colorectal Surgeon Should Know 1 January 2024:206-209 SCOPUS ID: 2-s2.0-85203231340 01/01/2024    
  • Concordance of Human Papillomavirus Genotypes in Mailed Home-Based Self-Collected Versus Clinician-Collected Anal Swabs Among Sexual and Gender Minority Individuals. (Nitkowski J, Giuliano AR, Ridolfi T, Chiao E, Fernandez ME, Schick V, Swartz MD, Smith JS, Nyitray AG) Sex Transm Dis 2024 Apr 01;51(4):270-275 PMID: 38133570 PMCID: PMC10978280 SCOPUS ID: 2-s2.0-85189191986 12/22/2023       3 Citations
  • Evaluation of the Rothman Index in Predicting Readmission after Colorectal Resection. (Peterson KJ, O'Donnell CM, Eastwood DC, Szabo A, Hu KY, Ridolfi TJ, Ludwig KA, Peterson CY) Am J Med Qual 2023 Nov 01;38(6):287-293 PMID: 37908031 SCOPUS ID: 2-s2.0-85175675759 11/01/2023       2 Citations
  • Lending a hand: The utility of hand-assisted laparoscopic surgery in diverticulitis with fistula. (Drezdzon MK, Calata JF, Peterson CY, Otterson MF, Ludwig KA, Ridolfi TJ) Surgery 2024 Mar;175(3):776-781 PMID: 37867107 SCOPUS ID: 2-s2.0-85174461267 10/23/2023       2 Citations
  • Acceptability of Anal Human Papillomavirus Home Self-Sampling and Clinician Sampling Among Sexual and Gender Minority Individuals in Milwaukee, Wisconsin: The Prevent Anal Cancer Self-Swab Study. (Nitkowski J, Giuliano AR, Ridolfi T, Chiao E, Fernandez ME, Schick V, Swartz MD, Smith JS, Nyitray AG) LGBT Health 2024 Jan;11(1):47-56 PMID: 37870947 PMCID: PMC11698672 SCOPUS ID: 2-s2.0-85176378709 10/23/2023       8 Citations
  • The impact of body mass index and physical disability on home-based anal self-sampling. (Nitkowski J, Fernandez ME, Ridolfi T, Chiao E, Giuliano AR, Schick V, Swartz MD, Smith JS, Nyitray AG) Cancer Causes Control 2024 Jan;35(1):161-166 PMID: 37632577 PMCID: PMC11622124 SCOPUS ID: 2-s2.0-85169145979 08/27/2023    
  • Going for Broke: The Impact of Cost of Living on Surgery Resident Stipend Value. (Drezdzon MK, Cowley NJ, Sweeney DP, Peterson CY, Ridolfi TJ, Ludwig KA, Evans DB, Calata JF) Ann Surg 2023 Dec 01;278(6):1053-1059 PMID: 37226808 SCOPUS ID: 2-s2.0-85176509408 05/25/2023       8 Citations
  • Home-based self-sampling vs clinician sampling for anal precancer screening: The Prevent Anal Cancer Self-Swab Study. (Nyitray AG, Nitkowski J, McAuliffe TL, Brzezinski B, Swartz MD, Fernandez ME, Deshmukh AA, Ridolfi TJ, Lundeen SJ, Cockerham L, Wenten D, Petroll A, Hilgeman B, Smith JS, Chiao EY, Giuliano AR, Schick V, Prevent Anal Cancer Self-Swab Study Team) Int J Cancer 2023 Aug 15;153(4):843-853 PMID: 37158105 PMCID: PMC10330574 SCOPUS ID: 2-s2.0-85158976331 05/09/2023       28 Citations
  • Digital Anal Rectal Examination Usage Among Individuals at Increased Risk for Anal Cancer. (Nyitray AG, Ridolfi TJ, Nitkowski J, McAuliffe TL, Deshmukh AA, Giuliano AR, Chiao EY, Prevent Anal Cancer Self-Swab Study Team) J Low Genit Tract Dis 2023 Jul 01;27(3):242-247 PMID: 36961479 PMCID: PMC10313742 SCOPUS ID: 2-s2.0-85164066580 03/25/2023       4 Citations
  • Predicting Neoadjuvant Treatment Response in Rectal Cancer Using Machine Learning: Evaluation of MRI-Based Radiomic and Clinical Models. (Peterson KJ, Simpson MT, Drezdzon MK, Szabo A, Ausman RA, Nencka AS, Knechtges PM, Peterson CY, Ludwig KA, Ridolfi TJ) J Gastrointest Surg 2023 Jan;27(1):122-130 PMID: 36271199 SCOPUS ID: 2-s2.0-85140356180 10/23/2022       12 Citations
  • Effect of the environment on home-based self-sampling kits for anal cancer screening. (Nitkowski J, Giuliano A, Ridolfi T, Chiao E, Fernandez ME, Schick V, Swartz MD, Smith JS, Schneider EA, Brzezinski B, Nyitray AG) J Virol Methods 2022 Dec;310:114616 PMID: 36096333 PMCID: PMC9645463 SCOPUS ID: 2-s2.0-85137795622 09/13/2022       7 Citations
  • Successful infusional 5-fluorouracil administration in a patient with vasospastic angina. (Tai S, Mohananey D, Griffiths C, Johnson B, Garg J, Ridolfi TJ, Lohr NL, Chakrabarti S, Brown SA) Am Heart J Plus 2022 May;17 PMID: 36051246 PMCID: PMC9432777 SCOPUS ID: 2-s2.0-85153852108 09/03/2022       2 Citations
  • Long term clinical outcomes and associated predictors of progression free survival in anal canal cancer (Beltrán Ponce SE, Erickson BA, Hall WA, Bedi M, Martens MJ, Siker M, Thomas J, George B, Ludwig K, Peterson C, Ridolfi T, Longo JM) Journal of Gastrointestinal Oncology February 2022;13(1):185-196 SCOPUS ID: 2-s2.0-85125562951 02/01/2022       2 Citations
  • Saddle block anesthetic technique for benign outpatient anorectal surgery. (Peterson KJ, Dyrud P, Johnson C, Blank JJ, Eastwood DC, Butterfield GE, Stekiel TA, Peterson CY, Ludwig KA, Ridolfi TJ) Surgery 2022 Mar;171(3):615-620 PMID: 34887088 SCOPUS ID: 2-s2.0-85120816955 12/11/2021       5 Citations
  • A Cautionary Note Regarding Obesity and Young Adult Rectal Cancer. (Peterson KJ, Blank JJ, Deshpande RR, Liu Y, Peterson CY, Ludwig KA, Ridolfi TJ) J Gastrointest Surg 2022 Apr;26(4):927-928 PMID: 34647224 SCOPUS ID: 2-s2.0-85117153577 10/15/2021    
  • Rationale and design of the Prevent Anal Cancer Self-Swab Study: a protocol for a randomised clinical trial of home-based self-collection of cells for anal cancer screening. (Nyitray AG, Schick V, Swartz MD, Giuliano AR, Fernandez ME, Deshmukh AA, Ridolfi TJ, Ajala C, Brzezinski B, Sandoval M, Nedjai B, Smith JS, Chiao EY) BMJ Open 2021 Jun 29;11(6):e051118 PMID: 34187833 PMCID: PMC8245463 SCOPUS ID: 2-s2.0-85110179885 07/01/2021       11 Citations
  • Impact of Auricular Neurostimulation in Patients Undergoing Colorectal Surgery with an Enhanced Recovery Protocol: A Pilot Randomized, Controlled Trial. (Blank JJ, Liu Y, Yin Z, Spofford CM, Ridolfi TJ, Ludwig KA, Otterson MF, Peterson CY) Dis Colon Rectum 2021 Feb 01;64(2):225-233 PMID: 33417346 SCOPUS ID: 2-s2.0-85099721640 01/09/2021       11 Citations
  • Hemorrhoids (Davids JS, Ridolfi TJ) Ascrs Textbook of Colon and Rectal Surgery Fourth Edition 1 January 2021:209-229 SCOPUS ID: 2-s2.0-85170164662 01/01/2021       5 Citations
  • Racial and Ethnic Variation Associated With Human Papillomavirus Genotype in Anal Dysplasia. (Mather TL, Hu KY, Rein LE, Szabo A, Lundeen SJ, Peterson CY, Ludwig KA, Ridolfi TJ) J Surg Res 2020 Dec;256:311-316 PMID: 32712446 SCOPUS ID: 2-s2.0-85088388259 07/28/2020       4 Citations
  • Laparoscopic Versus Robotic Proctectomy Outcomes: An ACS-NSQIP Analysis. (Hu KY, Wu R, Szabo A, Ridolfi TJ, Ludwig KA, Peterson CY) J Surg Res 2020 Nov;255:495-501 PMID: 32622164 SCOPUS ID: 2-s2.0-85087220088 07/06/2020       8 Citations
  • Initial Experience With Staging Rectal Adenocarcinoma Using 7T Magnetic Resonance Imaging (Blank J, Berger N, Knechtges P, Prost R, Peterson C, Ludwig K, Ridolfi T) Journal of Surgical Research January 2020;245:434-440 SCOPUS ID: 2-s2.0-85070873216 01/01/2020       2 Citations
  • Response to: "Alvimopan and outcome after colectomy?". (Hu KY, Peterson CY, Ludwig KA, Ridolfi TJ) Surgery 2020 Mar;167(3):677 PMID: 31785823 SCOPUS ID: 2-s2.0-85079128159 12/02/2019    
  • You Are Only as Frail as Your Arteries: Prehabilitation of Elderly Surgical Patients (Durand MJ, Beckert AK, Peterson CY, Ludwig KA, Ridolfi TJ, Lauer KK, Freed JK) Current Anesthesiology Reports 1 December 2019;9(4):380-386 SCOPUS ID: 2-s2.0-85079022988 12/01/2019       3 Citations
  • Retroileal anastomosis in hand-assisted laparoscopic left colectomy: experience at a single institution. (Blank JJ, Gibson EK, Peterson CY, Ridolfi TJ, Ludwig KA) Surg Endosc 2020 Aug;34(8):3408-3413 PMID: 31506794 SCOPUS ID: 2-s2.0-85072047772 09/12/2019       11 Citations
  • Use of Neoadjuvant Chemotherapy in the Treatment of Locally Advanced Rectal Cancer. (Hu KY, Simpson MT, Blank JJ, Szabo A, Eastwood D, Ludwig KA, Peterson CY, Ridolfi TJ) J Surg Res 2019 Nov;243:447-452 PMID: 31376796 SCOPUS ID: 2-s2.0-85069946509 08/04/2019       11 Citations
  • Alvimopan is associated with decreased length of stay for both open and laparoscopic segmental colectomy. (Henning RE, Hu KY, Rein LE, Szabo A, Peterson CY, Ludwig KA, Ridolfi TJ) Surgery 2019 Oct;166(4):483-488 PMID: 31345565 SCOPUS ID: 2-s2.0-85069647050 07/28/2019       10 Citations
  • Race Is Associated With Burden of Anal Condyloma and Need for Operative Intervention. (Foss HE, Blank JJ, Lundeen SJ, Peterson CY, Ludwig KA, Ridolfi TJ) J Surg Res 2018 Dec;232:629-634 PMID: 30463783 SCOPUS ID: 2-s2.0-85051385217 11/23/2018       3 Citations
  • The Authors Reply. (Ali F, Ridolfi TJ) Dis Colon Rectum 2018 Jul;61(7):e351 PMID: 29878957 SCOPUS ID: 2-s2.0-85077202255 06/08/2018    
  • Pouch Volvulus in Patients Having Undergone Restorative Proctocolectomy for Ulcerative Colitis: A Case Series. (Landisch RM, Knechtges PM, Otterson MF, Ludwig KA, Ridolfi TJ) Dis Colon Rectum 2018 Jun;61(6):713-718 PMID: 29664798 SCOPUS ID: 2-s2.0-85047745257 04/18/2018       22 Citations
  • Aortic Graft Infection Secondary to Iatrogenic Transcolonic Graft Malposition. (Blank JJ, Rothstein AE, Lee CJ, Malinowski MJ, Lewis BD, Ridolfi TJ, Otterson MF) Vasc Endovascular Surg 2018 Jul;52(5):386-390 PMID: 29554857 SCOPUS ID: 2-s2.0-85044326604 03/21/2018       5 Citations
  • Elevated Venous Thromboembolism Risk Following Colectomy for IBD Is Equal to Those for Colorectal Cancer for Ninety Days After Surgery. (Ali F, Al-Kindi SG, Blank JJ, Peterson CY, Ludwig KA, Ridolfi TJ) Dis Colon Rectum 2018 Mar;61(3):375-381 PMID: 29420429 SCOPUS ID: 2-s2.0-85046560406 02/09/2018       58 Citations
  • Is There Still a Role for Hand-Assisted Laparoscopic Surgery (HALS)? (Berger NG, Ridolfi TJ, Ludwig KA) Current Common Dilemmas in Colorectal Surgery 1 January 2018:207-216 SCOPUS ID: 2-s2.0-105009574986 01/01/2018    
  • Loop Ileostomy Closure as an Overnight Procedure: Institutional Comparison With the National Surgical Quality Improvement Project Data Set. (Berger NG, Chou R, Toy ES, Ludwig KA, Ridolfi TJ, Peterson CY) Dis Colon Rectum 2017 Aug;60(8):852-859 PMID: 28682971 SCOPUS ID: 2-s2.0-85024910729 07/07/2017       20 Citations
  • Outcome Analysis of Treatment in Stage IIA, T3N0 Rectal Adenocarcinoma in the Veterans Health Administration (VHA). (Hall WA, Lans D, Arce-Lara C, Kelley MJ, Santana-Davila R, Marcus DM, Tsai S, Ridolfi T, Erickson BA, Gore EM) Int J Radiat Oncol Biol Phys 2016 Oct 1;96(2S):E186 PMID: 27674006 09/28/2016    
  • Low Anterior Resection Syndrome: Current Management and Future Directions. (Ridolfi TJ, Berger N, Ludwig KA) Clin Colon Rectal Surg 2016 Sep;29(3):239-45 PMID: 27582649 PMCID: PMC4991969 SCOPUS ID: 2-s2.0-84983077447 09/02/2016       70 Citations
  • Achieving low anastomotic leak rates utilizing clinical perfusion assessment. (Kream J, Ludwig KA, Ridolfi TJ, Peterson CY) Surgery 2016 Oct;160(4):960-967 PMID: 27499148 SCOPUS ID: 2-s2.0-84994750881 08/09/2016       24 Citations
  • Delayed gastrointestinal recovery after abdominal operation - role of alvimopan. (Berger NG, Ridolfi TJ, Ludwig KA) Clin Exp Gastroenterol 2015;8:231-5 PMID: 26346889 PMCID: PMC4531031 SCOPUS ID: 2-s2.0-84940036963 09/09/2015       20 Citations
  • My Fistulas Are Just Not Healing. What Are You Going to Do About It? Surgical Management of Perianal Crohn’s Disease (Ridolfi T, Otterson MF) Inflammatory Bowel Disease A Point of Care Clinical Guide 1 January 2015:195-200 SCOPUS ID: 2-s2.0-105018255326 01/01/2015    
  • Achieving a complete colonic evaluation in patients with incomplete colonoscopy is worth the effort. (Ridolfi TJ, Valente MA, Church JM) Dis Colon Rectum 2014 Mar;57(3):383-7 PMID: 24509464 SCOPUS ID: 2-s2.0-84897570771 02/11/2014       25 Citations
  • Right Colectomy: Hand-Assist (Ludwig KA, Ridolfi T) Minimally Invasive Approaches to Colon and Rectal Disease Technique and Best Practices 1 January 2014:61-69 SCOPUS ID: 2-s2.0-105012658005 01/01/2014    
  • A case study in intra-abdominal sepsis. (Paul JS, Ridolfi TJ) Surg Clin North Am 2012 Dec;92(6):1661-77 PMID: 23153889 SCOPUS ID: 2-s2.0-84869110283 11/17/2012       20 Citations
  • Upregulation of mucosal 5-HT3 receptors is involved in restoration of colonic transit after pelvic nerve transection. (Gribovskaja-Rupp I, Takahashi T, Ridolfi T, Kosinski L, Ludwig K) Neurogastroenterol Motil 2012 May;24(5):472-8, e218 PMID: 22304456 SCOPUS ID: 2-s2.0-84862811573 02/07/2012       5 Citations
  • Recovery of colonic transit following extrinsic nerve damage in rats. (Ridolfi TJ, Tong WD, Kosinski L, Takahashi T, Ludwig KA) Scand J Gastroenterol 2011 Jun;46(6):678-83 PMID: 21561284 SCOPUS ID: 2-s2.0-79955954939 05/13/2011       11 Citations
  • The role of 5-HT3 and 5-HT4 receptors in the adaptive mechanism of colonic transit following the parasympathetic denervation in rats. (Tong W, Kamiyama Y, Ridolfi TJ, Zietlow A, Zheng J, Kosinski L, Ludwig K, Takahashi T) J Surg Res 2011 Dec;171(2):510-6 PMID: 20691988 PMCID: PMC2978263 SCOPUS ID: 2-s2.0-81155128104 08/10/2010       12 Citations
  • Exogenous stem cell factor improves interstitial cells of Cajal restoration after blockade of c-kit signaling pathway. (Tong W, Jia H, Zhang L, Li C, Ridolfi TJ, Liu B) Scand J Gastroenterol 2010 Aug;45(7-8):844-51 PMID: 20377480 SCOPUS ID: 2-s2.0-77955693527 04/10/2010       34 Citations
  • Effects of autonomic nerve stimulation on colorectal motility in rats. (Tong WD, Ridolfi TJ, Kosinski L, Ludwig K, Takahashi T) Neurogastroenterol Motil 2010 Jun;22(6):688-93 PMID: 20067587 PMCID: PMC2952396 SCOPUS ID: 2-s2.0-77951957986 01/14/2010       52 Citations
  • Abdominoperineal Resection, Low Anterior Resection, and Beyond (Ludwig K, Kosinski L, Ridolfi T) Current Clinical Oncology 2010;Part F5173:79-107 SCOPUS ID: 2-s2.0-105033385530 01/01/2010       1 Citation
  • Does every question deserve a randomized controlled trial? (Ludwig K, Ridolfi TJ) Arch Surg 2009 Dec;144(12):1132 PMID: 20030032 SCOPUS ID: 2-s2.0-73149122929 12/25/2009       3 Citations
  • Sympathetic and parasympathetic regulation of rectal motility in rats. (Ridolfi TJ, Tong WD, Takahashi T, Kosinski L, Ludwig KA) J Gastrointest Surg 2009 Nov;13(11):2027-33; discussion 2033 PMID: 19760300 SCOPUS ID: 2-s2.0-77952986555 09/18/2009       23 Citations
  • Surgical Education: The New Generation (Whitehouse J, Albright E, Bosbous M, Kiely M, Ludwig M, Parisi N, Ridolfi T) Journal of Surgical Education November 2007;64(6):431-432 SCOPUS ID: 2-s2.0-36549009080 11/01/2007       1 Citation
    • Last update: 08/06/2026