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.



Monahan KJ, Davies MM, Abulafi M, et al., 2022, Faecal immunochemical testing (FIT) in patients with signs or symptoms of suspected colorectal cancer (CRC): a joint guideline from the Association of Coloproctology of Great Britain and Ireland (ACPGBI) and the British Society of Gastroenterology (BSG), Gut, ISSN:0017-5749

Woodfield G, Belluomo I, Laponogov I, et al., 2022, Diagnostic performance of a non-invasive breath test for colorectal cancer: COBRA1 study, Gastroenterology, ISSN:0016-5085

Edwards P, Monahan KJ, 2022, Diagnosis and management of Lynch syndrome, Frontline Gastroenterology, Vol:13, ISSN:2041-4137, Pages:e80-e87

Sun M, Moquet J, Ellender M, et al., 2022, Potential risks associated with the use of ionizing radiation for imaging and treatment of colorectal cancer in Lynch syndrome patients, Familial Cancer, ISSN:1389-9600

Ahmad A, Moorghen M, Wilson A, et al., 2022, Implementation of optical diagnosis with a 'resect and discard strategy' in clinical practice: DISCARD3 study., Gastrointest Endosc

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