Annals of Surgical Oncology

, Volume 3, Issue 2, pp 131–135 | Cite as

Preoperative adjuvant radiation with chemotherapy for rectal cancer: Its impact on stage of disease and the role of endorectal ultrasound

  • Andrea Bernini
  • Kemal I. Deen
  • Robert D. Madoff
  • W. Douglas Wong
Original Articles

Abstract

Background: Preoperative adjuvant radiation combined with chemotherapy is a recent development in the management of patients with rectal cancer invading perirectal tissue and regional lymph nodes. This study was performed to assess the impact of preoperative adjuvant therapy in patients judged by endorectal ultrasound to have extramural invasion of rectal cancer and/or regional lymph node involvement on tumor regression in bowel wall and lymph nodes. The predictive value of ultrasound in staging wall penetration and lymph node involvement after preoperative adjuvant therapy was also assessed.

Methods: Patients (n=43) were selected by ultrasound to have preoperative irradiation (4,500–5,040 cGy over 5–6 weeks). In 30 patients this was combined with 5-fluorouracil, 370 mg/m2, for 5 days in the first and last weeks of irradiation. Pretreatment ultrasound was compared with pathologic findings in the resected specimen in all patients. Twenty-one were assessed by ultrasound after adjuvant therapy and findings compared with histology.

Results: Downstaging was seen in 23 (53%) patients with wall invasion and in 23 (72%) of 32 patients with lymph node involvement. Overall, downstaging was achieved in 30 (70%). Positive predictive values of ultrasound after irradiation were 72% and 56% for wall penetration and lymph node status, respectively. Negative predictive values of ultrasound after irradiation were 100% and 82%, respectively.

Conclusion: In the majority of patients with rectal cancer invading perirectal tissues or lymph nodes, lesions may be downstaged by preoperative adjuvant therapy. Endorectal ultrasound after adjuvant therapy for rectal cancer is of a lesser predictive value chiefly because of overstaging.

Key Words

Rectal cancer Stage Preoperative adjuvant radiation Preoperative adjuvant chemotherapy Endorectal ultrasound 

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Copyright information

© The Society of Surgical Oncology, Inc. 1996

Authors and Affiliations

  • Andrea Bernini
    • 1
  • Kemal I. Deen
    • 1
  • Robert D. Madoff
    • 1
  • W. Douglas Wong
    • 1
  1. 1.From the Division of Colon and Rectal Surgery, Department of SurgeryUniversity of Minnesota Medical SchoolMinneapolisUSA

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