title: Intra-abdominal recurrence of colorectal cancer detected by radioimmunoguided surgery (RIGS system).
abstract: Since 1986, 32 patients with metastatic colorectal cancer have undergone second-look radioimmunoguided surgery (RIGS system). The primary tumor was located in the right and transverse colon in 11 patients, left and sigmoid colon in 16, and rectum in five. The carcinoembryonic antigen level was elevated in 30 patients (94%); all patients underwent a computed tomographic scan of the abdomen and pelvis. The overall sensitivity of the computed tomographic scan was 41% (abdomen other than liver, 27%; liver, 58%; and pelvis, 22%). The RIGS system identified recurrent tumor in 81% of the patients. The most common site of metastasis was the liver (41%), independent of the primary location. Local/regional recurrences alone accounted for 40% of all recurrences. In six patients (18%), recurrent tumor was found only with the RIGS system. The RIGS system is more dependable in localizing clinically obscure metastases than other methods, and carcinoembryonic antigen testing remains the most accurate preoperative method to indicate suspected recurrences.
authors.affiliation: Department of Surgery, Ohio State University College of Medicine, Columbus 43210.
authors.forename: A
authors.initials: A
authors.lastname: Sardi
authors.forename: M
authors.initials: M
authors.lastname: Workman
authors.forename: C
authors.initials: C
authors.lastname: Mojzisik
authors.forename: G
authors.initials: G
authors.lastname: Hinkle
authors.forename: C
authors.initials: C
authors.lastname: Nieroda
authors.forename: E W
authors.initials: EW
authors.lastname: Martin
mesh_terms: D000008:Abdominal Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000556:secondary* / Q000601:surgery; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000911:Antibodies, Monoclonal; D002272:Carcinoembryonic Antigen / Q000032:analysis; D015179:Colorectal Neoplasms / Q000276:immunology / Q000601:surgery*; D005260:Female; D006801:Humans; D007457:Iodine Radioisotopes; D008113:Liver Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000556:secondary / Q000601:surgery; D008297:Male; D008722:Methods; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000175:diagnosis / Q000601:surgery*; D010386:Pelvic Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000556:secondary / Q000601:surgery; D012086:Reoperation; D014057:Tomography, X-Ray Computed
chemical_list: D000911:Antibodies, Monoclonal; D002272:Carcinoembryonic Antigen; D007457:Iodine Radioisotopes