Professor Hanna’s clinical work is based at Hammersmith Hospital, Imperial College Healthcare NHS Trust and includes oesophageal and gastric cancer and advanced laparoscopic surgery.

The current interests of his laboratory revolve around volatile organic compounds analysis for biomarker discovery and understanding the molecular drivers of volatile biomarkers, supported by CRUK research programme (AROMA). This programme aims to develop and validate a non-invasive breath test as a platform diagnostic technology to detect gastrointestinal (oesophageal, gastric, colorectal, pancreatic and liver) cancers. Professor Hanna also leads a research programme on point-of-care diagnostics, supported the NIHR Medtech and In vitro diagnostics co-operative. His surgical research aims to develop, validate and use competency assessment tools for training and quality assurance of surgical performance in randomised controlled clinical trials.