To improve detection of esophageal (pre)malignant lesions during surveillance endoscopy of patients at risk of developing malignancies, for example in Barrett's Esophagus (BE), there is a need for better endoscopic visualization and the ability for targeted biopsies. Optical molecular imaging of neoplasia associated biomarkers could form a promising technique to accommodate this need. It is known that the biomarker c-Met is overexpressed in dysplastic and neoplastic areas in BE segments versus normal tissue and has proven to be a valid target for molecular imaging.

Edinburgh Molecular Imaging Ltd (EMI) has developed a fluorescent tracer specifically targeting c-Met by labeling a small peptide to a fluorescent fluorophore: 'EMI-137'. The investigators hypothesize that when EMI-137 is administered intravenously, it accumulates in c-Met expressing high grade dysplasia (HGD) and esophageal adenocarcinoma (EAC), enabling (early) cancer visualization using a newly developed fluorescent fiber-bundle. This hypothesis will be tested in the current pilot intervention study.

See brief summary.

Inclusion Criteria:

• Age ≥ 18 years, eligible for a diagnostic and/or therapeutic endoscopy;

• At least a suspicion of low grade dysplasia (LGD) based on a prior endoscopy;

• World Health Organization (WHO) performance score of 0-2;

• Written informed consent;

• Mentally competent person that is able and willing to comply with study procedures;

• For female subjects who are of childbearing potential, are premenopausal with intact reproductive organs or are less than 2 years post-menopausal:

  • A negative serum pregnancy test prior to receiving the tracer;
  • Willing to ensure that she or her partner uses effective contraception during the trial and for 3 months thereafter.

Exclusion Criteria:

• Pregnancy or breast feeding;
• Advanced stage EAC patient not suitable for endoscopic resection;
• Medical or psychiatric conditions that compromise the patient's ability to give informed consent;
• Concurrent anticancer therapy (chemotherapy, radiotherapy, vaccines, immunotherapy) delivered within the last three months prior to the start of the treatment
• The subject has been included previously in this study or has been injected with another investigational medicinal product within the past six months.
• History of myocardial infarction (MI), Transient Ischemic Attack (TIA), CerebroVascular Accident (CVA), pulmonary embolism, uncontrolled congestive heart failure (CHF), significant liver disease, unstable angina within 6 months prior to enrollment.
• The subject had any significant change in their regular prescription or non-prescription medication between 14 days and 1 day prior to Investigational Medicinal Product (IMP) administration. Occasional use of analgesics, such as non-steroid anti-inflammatory drugs and/or paracetamol, was permitted at the discretion of the investigator. Use of hormonal contraceptives is permitted.