Dr Jason Dunn is a Consultant
Gastroenterologist at Guy’s and St
Thomas’ NHS Foundation Trust.
He studied at Guy’s, King’s and St
Thomas’ medical school, graduating
in 2000. He was awarded MRCP
(London) in 2005 and appointed as
a Consultant in 2012.
His special interest in Barrett’s
Oesophagus followed a CRUK
clinical fellowship at UCL, where
he studied use of optical diagnostics
and minimally invasive endoscopic
therapies. He gained his PhD in
2011 and has presented his work at
national and international meetings.
His work on treatment of Barrett’s
Oesophagus with RFA, and the use
of biomarkers to predict cancer
progression, has won prizes and
been published in high impact
Dr Dunn is proficient in EMR
and RFA, and teaches these
techniques internationally. He is
the Early Diagnosis Lead for the
London Cancer Alliance (LCA)
and has written guidelines for
the management of Barrett’s
Oesophagus for the LCA. He
currently holds Honorary Senior
Lecturer posts at King’s College
London and Oslo University in the
Institute of Medical Informatics, and
continues to be involved in research
into novel endoscopic treatment
of GI conditions.
Dr Jason Dunn
Guy’s and St Thomas’ NHS
The patient had minimal
chest discomfort after the
rst session,was treated
with Paracetamol and
returned to normal eating
after 48 hours.
DR JASON DUNN –
An 82-year-old woman presented with worsening heartburn
symptoms,with a past history of hypertension, atrial
brillation and osteoarthritis.An endoscopy performed
locally revealed a nodule arising in a segment of Barrett’s
Oesophagus. The biopsy demonstrated high grade dysplasia
and she was referred to Dr Jason Dunn for further evaluation.
The nodular area was characterised using Narrow Band Imaging,
an optical enhancement technique. The lesion was then removed
by EMR in one section and con rmed as high grade dysplasia,
but no invasive cancer. This was undertaken as a day case under
The remaining Barrett’s segment was then successfully treated
with RFA in two sessions, two months apart, also under sedation.
The patient had minimal chest discomfort after the rst session,
was treated with Paracetamol, and returned to normal eating after
48 hours. Six months after referral, the patient has no residual
Barrett’s Oesophagus on follow-up biopsy.