Stefan Riss

ORCID: 0000-0003-4039-2849
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About
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Research Areas
  • Anorectal Disease Treatments and Outcomes
  • Pelvic floor disorders treatments
  • Diverticular Disease and Complications
  • Colorectal Cancer Surgical Treatments
  • Inflammatory Bowel Disease
  • Appendicitis Diagnosis and Management
  • Intraperitoneal and Appendiceal Malignancies
  • Hernia repair and management
  • Colorectal and Anal Carcinomas
  • Colorectal Cancer Screening and Detection
  • Microscopic Colitis
  • Urinary Bladder and Prostate Research
  • Ovarian cancer diagnosis and treatment
  • Autoimmune and Inflammatory Disorders
  • Gastric Cancer Management and Outcomes
  • Genetic factors in colorectal cancer
  • Colorectal Cancer Treatments and Studies
  • Gastrointestinal disorders and treatments
  • Pelvic and Acetabular Injuries
  • Cardiac, Anesthesia and Surgical Outcomes
  • Pancreatic and Hepatic Oncology Research
  • Congenital gastrointestinal and neural anomalies
  • Inflammatory Biomarkers in Disease Prognosis
  • Diagnosis and Treatment of Venous Diseases
  • Endometrial and Cervical Cancer Treatments

Medical University of Vienna
2016-2025

Comprehensive Cancer Center Vienna
2018-2025

Vienna General Hospital
2024

St. Vincent's University Hospital
2022

Universitätsklinik für Chirurgie Wien
2012-2020

York Teaching Hospital NHS Foundation Trust
2017

St. Luke's International Hospital
2015

Basingstoke and North Hampshire Hospital
2014

American Society of Colon and Rectal Surgeons
2013

BACKGROUND: Pseudomyxoma peritonei is a diffuse peritoneal malignancy that generally originates form perforated appendiceal tumor. Optimal treatment requires extensive surgical resection to achieve complete cytoreduction combined with hyperthermic intraperitoneal chemotherapy. In proportion of patients this impossible, in particular, owing irresectable small-bowel involvement. There ongoing debate as the role maximal tumor debulking such cases. OBJECTIVE: The aim study was assess outcomes...

10.1097/dcr.0b013e3182a62b0d article EN Diseases of the Colon & Rectum 2013-11-06
Gennaro Perrone Mario Giuffrida Fikri M. Abu‐Zidan Vitor Favali Kruger Marco Livrini and 95 more Gabriele Luciano Petracca G. Rossi Antonio Tarasconi Brian Tian Elena Bonati Ricardo Mentz Federico N. Mazzini Juan Pablo Campana Elisabeth Gasser Reinhold Kafka‐Ritsch Daniel Moritz Felsenreich Christopher Dawoud Stefan Riss Carlos Augusto Gomes Felipe Couto Gomes Ricardo Alessandro Teixeira Gonzaga Cassio Alfred Brattig Canton Bruno M. Pereira Gustavo Pereira Fraga Leticia Gonçalves Zem Vinicius Cordeiro-Fonseca Renato de Mesquita Tauil Boyko Atanasov Nikolay Belev Nikola Kovachev Libardo J. Meléndez Ana Dimova Stefan Dimov Zdravko Zelić Goran Augustin Branko Bogdanić Trpimir Morić Élie Chouillard Melinda Bajul Belinda De Simone Yves Panís Francesco Esposito Margherita Notarnicola Lelde Lauka Anna Adele Fabbri Hassen Hentati Iskander Fnaiech Venara Aurélien M. Bougard Maxime Roulet Zaza Demetrashvili Irakli Pipia G Merabishvili Konstantinos Bouliaris George Koukoulis Christos Doudakmanis Sofia Xenaki Emmanuel Chrysos Stamatios Kokkinakis Pantelis Vassiliu Nikolaos V. Michalopoulos Ioannis Margaris Aristotelis Kechagias Konstantinos Avgerinos Jevgeni Katunin Eftychios Lostoridis Eleni-Aikaterini Nagorni Antonio Pujante Francesk Mulita Ioannis Maroulis Michail Vailas Athanasios Marinis Ioannis Siannis Eirini Bourbouteli Dimitrios K. Manatakis Nikolaos Tasis Vasileios Acheimastos Sotiropoulou Maria Kapiris Stylianos Harilaos Kuzeridis Dimitrios Korkolis Evangelos Fradelos George Kavalieratos Thalia Petropoulou Andreas Polydorou Ioannis Papacostantinou Tania Triantafyllou Despina Kimpizi Dimitrios Theodorou Konstantinos Toutouzas Alexandros Chamzin Maximos Frountzas Dimitriοs Schizas Ioannis Karavokyros Athanasios Syllaios Alexandros Charalabopoulos Maria Boura Efstratia Baili Orestis Ioannidis Lydia Loutzidou

Abstract Background Literature suggests colonic resection and primary anastomosis (RPA) instead of Hartmann’s procedure (HP) for the treatment left-sided emergencies. We aim to evaluate surgical options globally used treat patients with acute emergencies factors that leading choice treatment, comparing HP RPA. Methods This is a prospective, international, multicenter, observational study registered on ClinicalTrials.gov. A total 1215 who required surgery were included from 204 centers during...

10.1186/s13017-024-00543-w article EN cc-by World Journal of Emergency Surgery 2024-04-16

Smoking and a lack of immunosuppressive (IS) therapy are considered risk factors for intestinal surgery in Crohn's disease (CD). Good evidence the latter is lacking. The objective this study was to evaluate impact thiopurine treatment on surgical recurrence patients after first resection CD its possible interaction with smoking.Data 326 were retrieved retrospectively, subjects grouped according their postoperative exposure thiopurines. Treatment either azathioprine (AZA) or 6-mercaptopurine...

10.1038/ajg.2009.673 article EN The American Journal of Gastroenterology 2009-12-15

Which factors predict recurrence in patients with Crohn's disease the era of immunosuppressive medications is still under debate.The current study was conducted to assess long-term outcome after ileocolic resection for and define predictive surgical relapse.This a retrospective study.The tertiary referral center.A consecutive cohort (n = 203) who underwent between 1997 2006 were analyzed. The mean follow-up time 8.4 (±2.4) years.The cumulative probability repeated intestinal recurrent...

10.1097/dcr.0b013e31828cb80c article EN Diseases of the Colon & Rectum 2013-06-05

Abstract Aim Ventral mesh rectopexy (VMR) is an established surgical treatment for rectal prolapse and outlet obstruction. In contrast to continental Europe, in the UK US use of synthetic has been abandoned favour biologic mesh, due concerns regarding related morbidity. The current study investigated if either material superior, terms clinical recurrence complications. Methods VMRs performed between March 2012 July 2022 three international pelvic floor centres were prospectively collected...

10.1111/codi.17273 article EN Colorectal Disease 2025-01-01

The treatment of locally advanced rectal cancer (LARC) has steadily progressed over the past four decades, with recent focus shifting towards total neoadjuvant therapy (TNT). This survey aims to elucidate perceived surgical challenges faced by Austrian colorectal surgeons performing mesorectal excision (TME), focusing on increased complexity and difficulty introduced intensified regimens. A comprehensive was conducted among explore various aspects managing TME following TNT. included...

10.3390/cancers17020283 article EN Cancers 2025-01-17

Abstract Background Rectocele and intussusception are frequently observed during defecography as potential contributors to obstructed defecation syndrome (ODS). We aimed describe our initial experience with transanal minimally invasive surgery (TAMIS) mucosectomy muscular plication, a novel surgical approach treat patients ODS. Methods Conducted between August 2021 October 2023 at the Medical University of Vienna, 11 (8 female) were prospectively enrolled underwent TAMIS circular...

10.1007/s10151-024-03101-3 article EN cc-by Techniques in Coloproctology 2025-02-21

Introduction Postoperative pancreatic fistula (POPF) is the most frequent complication after partial pancreatectomy, which by definition associated with clinical consequences requiring changes in postoperative management. Despite numerous scientific efforts, effective procedures to prevent POPF are lacking. Obsidian ASG autologous platelet-rich fibrin matrix has been effectively applied anastomotic leakage following colorectal surgery. This study first investigate feasibility of using...

10.1136/bmjopen-2024-088867 article EN cc-by-nc-nd BMJ Open 2025-03-01

Endo-sponge assisted treatment (endo-sponge) represents a novel approach to treat patients with anastomotic dehiscence following anterior resection for rectal cancer. Yet, limited data are available predict success, compatibility radiotherapy and/or chemotherapy as well acceptance by the patients.Between September 2007 and June 2008, nine suffering from leakage after (n = 6) or of stump Hartmann's procedure 3) were treated endo-sponge. We recorded clinical outcome patient's comfort using...

10.1111/j.1463-1318.2009.01885.x article EN Colorectal Disease 2009-04-13

Summary Background The use of mesenchymal stem cells is considered a novel and promising therapeutic option for patients with perianal fistulizing Crohn’s disease; however, data on its clinical application remain scarce. This multicenter nationwide study aimed to assess the efficacy in closing complex anal fistulas. Methods In this 14 disease (3 males, 11 females) fistulas treated 3 tertiary hospitals Austria were included between October 2018 April 2021. Injection 120 million allogeneic...

10.1007/s00508-023-02283-4 article EN cc-by Wiener klinische Wochenschrift 2023-10-12

Sacral nerve modulation has become an established treatment for fecal and urinary incontinence, sexual disorders. The objective of this study was to evaluate the long-term outcome sacral neuromodulation in patients with or combined incontinence (double incontinence), assessing its safety, efficacy, impact on quality life function. This a multicentric, retrospective, cohort including double who received at seven European centers between 2007 2017 completed 5-year follow-up. main measures...

10.1007/s13304-023-01570-z article EN cc-by Updates in Surgery 2023-07-13

There are few studies into the quality of life patients with haemorrhoids. The aim this study was to assess haemorrhoids in an adult general population.Participants, who attended Austrian nationwide healthcare programme for colorectal cancer screening at four medical institutions, were enrolled prospectively between 2008 and 2009. A colonoscopy performed all patients. Haemorrhoids classified according international grading system defined as symptomatic cases bleeding, itching, soiling or...

10.1111/j.1463-1318.2010.02480.x article EN Colorectal Disease 2010-10-26

AIM:To assess long-term efficacy of initially successful endo-sponge assisted therapy. METHODS:Between 2006 and 2009, consecutive patients who had undergone primary endosponge treatment anastomotic leakage following rectal cancer surgery were enrolled in the study.Patients recruited from 6 surgical departments Vienna.Clinical oncologic outcomes assessed through routine endoscopic radiologic follow-up examination. RESULTS:Twenty (7 female, 13 male) included.The indications for (n = 17)...

10.3748/wjg.v16.i36.4570 article EN cc-by-nc World Journal of Gastroenterology 2010-01-01

The use of a loose seton for complex anal fistulae can cause perianal discomfort and reduced quality life. aim this study was to assess the impact novel knot-free Comfort Drain on life, comfort faecal continence compared conventional setons.Forty-four patients treated fistula at single institution between July 2013 September 2014 were included in study. A matched-pair analysis performed compare with controls who managed by knotted setons. 12-item Short Form survey (SF-12) questionnaire used...

10.1111/codi.13335 article EN Colorectal Disease 2016-03-22

Abstract Aim There is growing evidence that stapled anastomoses are similarly effective compared to hand‐sewn in Crohn’s patients. This study was designed assess safety and limitations of wide‐lumen ileocolic anastomoses. Method All patients with resections for disease perfomed between 1998 2006 were studied. A anastomosis constructed whenever possible. Potential risk factors postoperative complications recorded, retrospectively. Univariate multivariate analyses performed. Results In 209 out...

10.1111/j.1463-1318.2009.02180.x article EN Colorectal Disease 2009-12-21

Patients with slow transit constipation who do not respond satisfactorily to common medical treatment are considered candidates for colectomy. The present observational long term study was designed assess outcome after surgery.Twenty consecutive patients were treated by colectomy between 1996 and 2004. Preoperative postoperative data reviewed using our institutional database. A questionnaire including validated scoring systems questions about complications subsequent surgical interventions...

10.1111/j.1463-1318.2008.01592.x article EN Colorectal Disease 2008-05-29
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