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Sposato LA, Lam Y, Karapetis C, Vatandoust S, Roy A, Hakendorf P, Dwyer A, de Fontgalland D, Hollington P, Wattchow D. Observation of "complete clinical response" in rectal cancer after neoadjuvant chemoradiation: The Flinders experience. Asia Pac J Clin Oncol 2018; 14:439-445. [PMID: 29932278 DOI: 10.1111/ajco.12993] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Accepted: 04/29/2018] [Indexed: 01/17/2023]
Abstract
AIM Observation with close follow-up ("watch and wait") is a recognized treatment option in patients who achieve a complete clinical response to long course chemoradiotherapy. This review of a prospective database aims to evaluate the clinical outcomes among patients with a complete clinical response managed with observation. METHODS A prospective study of 32 patients who achieved a complete clinical response was undertaken. The primary outcomes measured were overall and recurrence-free survival, and rate of organ preservation in patients who deferred immediate surgery. RESULTS Seven patients developed local regrowth over a median follow-up period of 38 months (range, 9-91 months). Median time to detection was 12 months. All seven underwent salvage surgery with complete surgical clearance. One patient developed combined local and systemic recurrence following a low anterior resection. Organ preservation was possible in 25 (78%) patients who sustained a complete clinical response with no evidence of local regrowth or disease recurrence. Among the patients who sustained a complete response, two developed isolated systemic disease. Overall and recurrence-free survival was 95.7% and 87.0%, respectively. CONCLUSION The majority of patients with rectal cancer who achieved a complete clinical response after chemoradiotherapy and managed with a "watch and wait" approach preserved their rectum and did not develop cancer relapse. Salvage surgery was achieved in all patients who developed local regrowth. The study supports a period of observation in rectal cancer patients who achieve a complete clinical response.
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Affiliation(s)
- Luigi A Sposato
- Department of Surgery, Flinders Medical Centre, Flinders University, Bedford Park, South Australia, Australia
| | - Yick Lam
- Department of Surgery, Flinders Medical Centre, Flinders University, Bedford Park, South Australia, Australia
| | - Chris Karapetis
- Department of Medical Oncology, Flinders Medical Centre, Flinders University, Bedford Park, South Australia, Australia
| | - Sina Vatandoust
- Department of Medical Oncology, Flinders Medical Centre, Flinders University, Bedford Park, South Australia, Australia
| | - Amitesh Roy
- Department of Medical Oncology, Flinders Medical Centre, Flinders University, Bedford Park, South Australia, Australia
| | - Paul Hakendorf
- Department of Epidemiology, Flinders Medical Centre, Flinders University, Bedford Park, South Australia, Australia
| | - Andrew Dwyer
- Department of Radiology, Flinders Medical Centre, Flinders University, Bedford Park, South Australia, Australia
| | - Dayan de Fontgalland
- Department of Surgery, Flinders Medical Centre, Flinders University, Bedford Park, South Australia, Australia
| | - Paul Hollington
- Department of Surgery, Flinders Medical Centre, Flinders University, Bedford Park, South Australia, Australia
| | - David Wattchow
- Department of Surgery, Flinders Medical Centre, Flinders University, Bedford Park, South Australia, Australia
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