Imperial College London


Faculty of MedicineDepartment of Surgery & Cancer

Honorary Clinical Senior Lecturer



k.monahan Website




CRUKSt Marks HospitalNorthwick Park and St Marks Site





Consultant Gastroenterologist and Endoscopist at the Lynch Syndrome and Family Cancer Clinic, Polyposis Registry and Wolfson Endoscopy Unit, at St Mark’s Hospital, London.

PhD in Cancer Genetics from Imperial College and the University of London 2009.

We perform genetic testing, endoscopic and other screening for gastrointestinal cancer in susceptible populations.  I am also interested in caring for patients with other GI diseases with colleagues.

I am currently continuing my research interests in clinical and molecular aspects of gastrointestinal pathology, particularly in the field of endoscopy, colorectal, pancreatic and other GI cancers, GI polyps and other neoplasia.



Al Maliki H, Monahan K, 2023, The diagnostic yield of colonoscopic surveillance following resection of early-age onset colorectal cancer (EOCRC), United European Gastroenterology Journal, ISSN:2050-6414

Valle L, Monahan K, 2023, Genetic predisposition to gastrointestinal polyposis: syndromes, tumour features, genetic testing, and clinical management, The Lancet Gastroenterology & Hepatology, ISSN:2468-1253

Møller P, Seppälä TT, Ahadova A, et al., 2023, Dominantly inherited micro-satellite instable cancer - the four Lynch syndromes - an EHTG, PLSD position statement, Hereditary Cancer in Clinical Practice, Vol:21, ISSN:1731-2302

Alexander J, Monahan K, 2023, The diagnostic yield of genetic testing in patients with multiple colorectal adenomas: a specialist centre cohort study, Clinical and Translational Gastroenterology, ISSN:2155-384X

Lincoln AG, Benton SC, Piggott C, et al., 2023, Risk-stratified faecal immunochemical testing (FIT) for urgent colonoscopy in Lynch syndrome during the COVID-19 pandemic, Bjs Open, Vol:7, ISSN:2474-9842, Pages:1-8

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