Author Biographies

Sithdharthan Ravikumar received his MBBS degree from Pondicherry Institute of Medical Sciences, Pondicherry, India, and subsequently completed his Membership of the Royal College of Surgeons of England (MRCS). In 2024, joined the Department of General Surgery at George Eliot Hospital NHS Trust, United Kingdom. He is currently continuing his clinical training in general and emergency surgery. His research topics mainly include perioperative outcomes, emergency laparotomy, nutritional risk assessment, prognostic indices, and the optimisation of surgical care pathways.
Kasun Wanigasooriya received his MBChB degree from the University of Birmingham in 2010, and later completed a Postgraduate Certificate in Medical Education (PGCert) in 2015, an MBA in 2020, and a PhD in Cancer and Genomics from the University of Birmingham in 2022. He also attained Fellowship of the Royal College of Surgeons of England (FRCS) in 2023. He worked across general surgery departments in various acute NHS Trusts in the West Midlands, Worcestershire, and Warwickshire before joining the Department of General Surgery at George Eliot Hospital NHS Trust, North Warwickshire, as a Consultant Colorectal and General Surgeon. He concurrently holds an academic appointment as Honorary Associate Professor at the University of Birmingham and is active in undergraduate and postgraduate surgical education and research. His research topics mainly include colorectal cancer, cancer genomics, emergency and elective general surgery, patient-derived organoid models, and surgical outcomes.
Shashikanth Vijayaraghavalu received his MBBS degree from AIMS, Karnataka, India, and later completed his MS in General Surgery from Annamalai University, Tamil Nadu. He subsequently attained Membership of the Royal College of Surgeons of England (MRCS). He is currently working in the Department of General Surgery at George Eliot Hospital NHS Trust, where he contributes to both emergency and elective general surgical services. He has been actively involved in clinical audit, perioperative data collection, and collaborative research. His research topics mainly include postoperative outcomes, emergency laparotomy, frailty assessment, and quality improvement in acute surgical care.
Lanoayo Agbabiaka completed her medical training in the United Kingdom. She began her clinical career with Foundation Year 1 (F1) training at George Eliot Hospital NHS Trust. She has since worked across several NHS hospitals in general and emergency surgery, gaining experience in acute surgical admissions and perioperative care. She is currently part of the General Surgery Department at George Eliot Hospital NHS Trust, contributing to multidisciplinary patient management and emergency surgical care. She has participated in multiple research and audit projects. Her research topics mainly include perioperative optimisation, emergency abdominal surgery, postoperative recovery, and nutritional assessment
Yahia Shuker received his medical degree. He completed higher surgical training in the UK, and is currently practising in General and Colorectal Surgery at George Eliot Hospital NHS Trust, Nuneaton. He worked as a Specialty Registrar (SpR) at George Eliot Hospital (2017) and has been affiliated with the Department of Colorectal Surgery since at least 2013, contributing to peer-reviewed work on diverticular disease and emergency general surgery. In recent years, he has continued at George Eliot Hospital, presenting service-development and outcomes research in national surgical forums. His research topics mainly include colorectal surgery, emergency general surgery, postoperative outcomes and readmissions, and optimisation of surgical pathways
Christian Katz received his medical degree in the United Kingdom and completed his higher surgical training in general and upper gastrointestinal surgery. He subsequently obtained Fellowship of the Royal College of Surgeons (FRCS). He is currently a Consultant Upper GI and General Surgeon at George Eliot Hospital NHS Trust, where he provides elective and emergency surgical services and contributes to endoscopic and minimally invasive surgical care. He has participated in clinical research and service development projects, with interests in laparoscopic surgery, biliary and foregut pathology, imaging-enhanced surgery, and emergency abdominal conditions. His research topics mainly include surgical outcomes, minimally invasive techniques, perioperative optimisation, and innovations in upper gastrointestinal surgery.
Balasubramanian Piramanayagam is a Consultant General & Colorectal Surgeon at George Eliot Hospital NHS Trust, United Kingdom. He completed his specialist surgical training in general and colorectal surgery in the West Midlands deanery and undertook a dedicated Laparoscopic Colorectal Fellowship at Bradford Royal Infirmary. Since 2012, he has served on staff at George Eliot Hospital, where he has also held senior leadership roles including Clinical Director of Surgery from 2018 to 2023. He currently serves as the Chair of the Specialty Advisory Committee for General Surgery in the UK and Ireland and as Training Programme Director for general surgery in the West Midlands, supervising higher surgical trainees and contributing to national surgical education governance. His clinical and research interests include colorectal cancer, inflammatory bowel disease, advanced laparoscopic and endoscopic surgery, hernia surgery, perianal disease, and enhanced perioperative care.
Aravindan Narayanan received his MB BS and MS in General Surgery in India, following which he completed a laparoscopic colorectal fellowship in the United Kingdom. He was appointed in 2016 as a Consultant Laparoscopic, General and Colorectal Surgeon at George Eliot Hospital NHS Trust, Warwickshire, where he also serves as Lead Surgeon for Inflammatory Bowel Disease. He is an accredited colonoscopy trainer, a JAG-accredited bowel cancer screening colonoscopist, and an examiner for surgical trainees at Warwick University Medical School. His research topics mainly include laparoscopic and minimally invasive colorectal surgery, emergency and elective general surgery, inflammatory bowel disease management, and perioperative care optimisation.
Altaf Haji is a Consultant Surgeon at George Eliot Hospital NHS Trust, United Kingdom. He holds surgical qualifications (MS, DNB) and Fellowship of the Royal College of Surgeons (FRCS), and is also listed as an Honorary Clinical Lecturer at Warwick Medical School.  He has authored multiple peer-reviewed publications spanning emergency general surgery, gastrointestinal and biliary disease, and perioperative care — including recent studies on elderly patients undergoing emergency laparotomy and case reports on rare biliary pathology. His research topics mainly include emergency general surgery, biliary and gallbladder disease, postoperative outcomes, risk stratification, surgical audit and service optimisation.
Muhammad Imran Aslam received his medical qualification in 2001. He holds Fellowship of the Royal College of Surgeons (FRCS). He currently serves as a Consultant Colorectal and General Surgeon at George Eliot Hospital NHS Trust (and is listed as working with Nuffield Health and private practice in Warwickshire). He is also involved in research and surgical trials in collaboration with University of Birmingham, Warwick and George Eliot Hospitals. His clinical and academic interests include minimally invasive colorectal and general surgery, inflammatory bowel disease, hernia repair and abdominal wall reconstruction, endoscopic and colorectal screening (including colonoscopy and polyp management), perioperative optimisation, surgical audit, and postoperative outcomes research.
Kalimuthu Marimuthu studied medicine and completed his general surgical training in India, before relocating to the United Kingdom in 1996 to train in general and colorectal surgery. He holds Fellowship of the Royal College of Surgeons (FRCS – Edinburgh) and has been a Consultant General and Colorectal Surgeon for over 13 years. He is currently the lead consultant for the Colorectal Team at George Eliot Hospital NHS Trust, Nuneaton, United Kingdom, where he provides a full range of services in colorectal and general surgery, including advanced laparoscopic surgery, colorectal cancer management, stoma formation, endoscopy and peri-anal procedures. His academic and clinical interests include colorectal cancer, colorectal and colorectal-surgical disease (inflammatory bowel disease, diverticular disease), hernia surgery, enhanced recovery after surgery, stoma care and prevention of parastomal hernia using prophylactic mesh, and laparoscopic and minimally invasive colorectal procedures. He has contributed to multiple peer-reviewed publications, including research on prophylactic preperitoneal mesh placement at stoma formation and long-term outcomes of mesh use in parastomal hernia prevention.
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