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.



Ryan NAJ, Snowsill T, McKenzie E, et al., 2021, Should women with Lynch syndrome be offered gynaecological cancer surveillance?, Bmj, Vol:374, ISSN:1759-2151, Pages:1-4

Alexander J, Johnston B, Smith T, et al., 2021, Low referral rates for genetic assessment of patients with multiple adenomas in United Kingdom Bowel Cancer Screening Programmes, Diseases of the Colon and Rectum, Vol:64, ISSN:0012-3706, Pages:1058-1063

D'Souza N, Monahan K, Benton SC, et al., 2021, Finding the needle in the haystack: the diagnostic accuracy of the faecal immunochemical test for colorectal cancer in younger symptomatic patients, Colorectal Disease, ISSN:1462-8910

D'Souza N, Delisle TG, Chen M, et al., 2021, Faecal immunochemical testing in symptomatic patients to prioritize investigation: diagnostic accuracy from NICE FIT Study, British Journal of Surgery, Vol:108, ISSN:0007-1323, Pages:804-810

Win AK, Dowty JG, Reece JC, et al., 2021, Variation in the risk of colorectal cancer in families with Lynch syndrome: a retrospective cohort study, The Lancet Oncology, ISSN:1470-2045

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