Imperial College London


Faculty of MedicineDepartment of Surgery & Cancer

Honorary Clinical Senior Lecturer



+44 (0)20 3312 7657s.markar




Queen Elizabeth the Queen Mother Wing (QEQM)St Mary's Campus





From 2013 to 2016, I was awarded doctoral research fellowship by the National Institute for Health Research (NIHR) in the United Kingdom, through which I undertook my first PhD at Imperial College London. The subject was basic science focusing on non-invasive breath analysis of volatile organic compounds (breath test) for the diagnosis of gastro-intestinal cancer. From 2015 to 2018 I undertook my second PhD at Karolinska Institutet in Sweden, through which I developed further knowledge in clinical research in the surgical treatment of oesophageal cancer.

In 2016, I was awarded my first postdoctoral position with a NIHR Clinical Trials fellowship, to support my training in the design and conduct of randomised clinical trials /RCTs) at Imperial College London. Through this fellowship I was also able to work on an RCT comparing minimally invasive with open surgery for oesophageal cancer, which was published in New England Journal of Medicine. In 2017 I was appointed as NIHR Clinical Lecturer in Oesophago-Gastric Surgery at Imperial College London. The focus of my research became cancer survivorship, through which I coordinated three large multi-center European studies with recruitment of over 1000 oesophageal cancer survivors. I also continued my basic science research in breath test analysis as supervisor of PhD students, studying breath profiling of early oesophageal cancer and its premalignant lesion (Barrett’s oesophagus).  



Antoniou SA, Florez ID, Markar S, et al., 2022, AGREE-S: AGREE II extension for surgical interventions: appraisal instrument., Surg Endosc, Vol:36, Pages:5547-5558

Markar SR, 2022, Prolonging Survival in Advanced Esophageal Squamous Cell Carcinoma With Immune Checkpoint Inhibitors., Gastroenterology, Vol:163

Cools-Lartigue J, Markar S, Mueller C, et al., 2022, An International Cohort Study of Prognosis Associated with Pathologically Complete Response Following Neoadjuvant Chemotherapy versus Chemoradiotherapy of Surgical Treated Esophageal Adenocarcinoma., Ann Surg

Chidambaram S, Sounderajah V, Maynard N, et al., 2022, Evaluation of post-operative surveillance strategies for esophageal and gastric cancers: a systematic review and meta-analysis, Diseases of the Esophagus, ISSN:1120-8694

Kamarajah SK, Markar SR, Phillips AW, et al., 2022, Survival benefit of adjuvant chemotherapy following neoadjuvant therapy and oesophagectomy in oesophageal adenocarcinoma., Eur J Surg Oncol

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