Single Dose Investigator Initiated Pilot Study to Investigate CYTALUX (Pafolacianine) for Intraoperative Detection of Malignant Tissue in Subjects Undergoing Surgical Resection for Cancer.

Inclusion Criteria:

1. Male and Female patients 18 years of age and older
2. Have a primary diagnosis, or a high clinical suspicion, of gastrointestinal, fore gut, pancreatic, hepatobiliary, esophageal malignancies and gyn malignancies planned for HIPEC/debulking, warranting surgery.
3. Are scheduled to undergo surgical intervention for tumor resection or diagnostic laparoscopy for assessment of disease burden.
4. Willingness to stop the use of folate, folic acid, or folate-containing supplements within 48 hours before administration of Cytalux
5. Willingness of research participant or legal guardian/representative to give written informed consent.

Exclusion Criteria:

1. Any medical condition that in the opinion of the investigators could potentially jeopardize the safety of the subject
2. History of anaphylactic reactions to products containing indocyanine green for near infrared imaging. Subjects with a medical history of 'idiopathic anaphylaxis' will require evaluation.
3. History of allergy to any of the components of CYTALUX™ (pafolacianine) injection
4. Presence of any psychological, familial, sociological condition or geographical challenges potentially hampering compliance with the study protocol or follow-up schedule