Study in Patients With Peritoneal Carcinomatosis From CEA Overexpressing Digestive Cancer

Inclusion Criteria: 1. Cytologically or histologic proven primary or recurrent digestive adenocarcinoma and eligible for hyperthermic intraperitoneal chemoperfusion (HIPEC) procedure, 2. Evidence of peritoneal carcinomatosis, presume resectable, assessed by imaging (CT scan (Computed Tomography Scanner) and / or MRI (Magnetic Resonance Imaging)) or during a previous abdominal surgery,, 3. CEA positivity by immunohistochemistry on specimen of primary tumor or recurrence lesion, or circulating plasma CEA ≥ 2 times the upper limit of normal range (ULN), 4. ECOG (Eastern Cooperative Oncology group) \< 1 5. Life expectancy of at least three months, 6. AST (Aspartate AminoTransferase), ALT (Alanine AminoTransferase) and Alkaline Phosphatase levels ≤ 5 times the ULN, 7. Total bilirubin ≤ 1.5 times the ULN, Serum creatinine ≤ 1.5 times the ULN, absolute neutrophils counts ≥ 1.5 x 109/L, platelet count ≥ 100 x 109/L and hemoglobin ≥ 9 g/dL,(red blood transfusion is allowed if needed), 8. Patients aged over 18 years old, 9. Patients affiliated to a French Social Security System, 10. Signed informed consent (IC) obtained before any study specific procedures. Exclusion Criteria: 1. ASA (American Society of Anesthesiologists) score ≥ 3, 2. Anticancer therapy (e.g. chemotherapy, radiotherapy, targeted therapy, concomitant systemic immune therapy, or any experimental therapy) within 4 weeks before inclusion, 3. Known serious immune allergic history, 4. Rate of circulating plasma CEA ≥ 300 ng / ml, 5. Other malignancies either currently active or diagnosed in the last 5 years, except adequately treated in situ carcinoma of the cervix and basal or squamous cell skin carcinoma. 6. Female patients pregnant or breastfeeding (pregnancy should be ruled by an assay of βhCG plasma within 7 days prior to administration of the conjugate). Patients with reproductive potential and who are sexually active must agree to have at least two methods of contraception for the duration of treatment (2 weeks before and 8 12 weeks after the administration of SGM-101) Male patients, must use an effective method of contraception (condom with spermicidal foam or gel; true abstinence; or vasectomy throughout the study and up to 12 weeks after last SGM-101 administration). 7. Known positive test for human immunodeficiency virus (HIV), hepatitis B surface antigen (HBsAG) or hepatitis C virus (HCV) antibody or patients with untreated serious infections, 8. Any other concurrent and/or uncontrolled medical condition or metabolic dysfunction, that would, in the investigator's judgment contraindicate her participation in the clinical study 9. Legal incapacity or physical, psychological or mental status interfering with the patient's ability to sign the informed consent or to terminate the study.