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Bailleux C, Zwarthoed C, Evesque L, Baron D, Scouarnec C, Benezery K, Chardin D, Jaraudias C, Chateau Y, Gal J, François E. Prognostic impact of post-treatment FDG PET/CT in anal canal cancer: A prospective study. Radiother Oncol 2023; 188:109905. [PMID: 37678620 DOI: 10.1016/j.radonc.2023.109905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 08/12/2023] [Accepted: 09/01/2023] [Indexed: 09/09/2023]
Abstract
BACKGROUND AND PURPOSE The aim of our prospective study was to assess the prognostic value of 18F-FDG PET/CT performed two months post treatment for anal canal neoplasm. POPULATION AND METHODS Consecutive patients with histologically proved anal cancer, with 18F-FDG PET/CT pre and two months post treatment were included. Patients were not previously treated for this neoplasm and then received radiotherapy ± chemotherapy. Clinical and pathologic data were collected and for 18F-FDG PET/CT visual and quantitative analysis (standardized uptake value, metabolic volume) were performed; response was classified according to EORTC and PERCIST criteria. The results were assessed for disease free survival and local recurrence free survival using the log-Rank test RESULTS: From December 2014 to September 2019, 94 consecutive patients were screened and 78 were included in this study. Median follow-up was 51 months. Two months post treatment, 37 patients (47.4%) had a complete radiological response according to both EORTC and PERCIST criteria, 66 patients (84.6%) had a clinical complete response. For disease free survival, the prognostic value of complete response was statistically significant (p=0.02) with 18F-FDG PET/CT and with clinical examination (p<0.001). For local recurrence free survival, the prognostic value with 18F-FDG PET/CT was lower (p=0.04) than clinical examination (p < 0.007). CONCLUSION While clinical examination remains the gold standard for post treatment evaluation in anal cancer, 18F-FDG PET/CT has a statistically significant prognostic value. These two assessments could be combined to improve early evaluation.
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Affiliation(s)
- Caroline Bailleux
- Centre Antoine Lacassagne, Department of Medical Oncology, 33 avenue de Valombrose 06189 Nice, France
| | - Colette Zwarthoed
- Centre Antoine Lacassagne, Department of Nuclear Medicine, 33 avenue de Valombrose 06189 Nice, France
| | - Ludovic Evesque
- Centre Antoine Lacassagne, Department of Medical Oncology, 33 avenue de Valombrose 06189 Nice, France
| | - David Baron
- Centre Antoine Lacassagne, Department of Radiation Oncology, 33 avenue de Valombrose 06189 Nice, France
| | - Cyrielle Scouarnec
- Centre Antoine Lacassagne, Department of Radiation Oncology, 33 avenue de Valombrose 06189 Nice, France
| | - Karen Benezery
- Centre Antoine Lacassagne, Department of Radiation Oncology, 33 avenue de Valombrose 06189 Nice, France
| | - David Chardin
- Centre Antoine Lacassagne, Department of Nuclear Medicine, 33 avenue de Valombrose 06189 Nice, France
| | - Claire Jaraudias
- Centre Antoine Lacassagne, Department of Medical Oncology, 33 avenue de Valombrose 06189 Nice, France
| | - Yann Chateau
- Centre Antoine Lacassagne, Department of Medical Statistic, 33 avenue de Valombrose 06189 Nice, France
| | - Jocelyn Gal
- Centre Antoine Lacassagne, Department of Medical Statistic, 33 avenue de Valombrose 06189 Nice, France
| | - Eric François
- Centre Antoine Lacassagne, Department of Medical Oncology, 33 avenue de Valombrose 06189 Nice, France.
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Possiel J, Ammon HE, Guhlich M, Conradi LC, Ghadimi M, Wolff HA, Schirmer MA, Samel S, Mügge M, Rieken S, Leu M, Dröge LH. Volumetric Modulated Arc Therapy Improves Outcomes in Definitive Radiochemotherapy for Anal Cancer Whilst Reducing Acute Toxicities and Increasing Treatment Compliance. Cancers (Basel) 2021; 13:cancers13112533. [PMID: 34064061 PMCID: PMC8196749 DOI: 10.3390/cancers13112533] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 05/16/2021] [Accepted: 05/19/2021] [Indexed: 01/13/2023] Open
Abstract
Simple Summary Intensity-modulated radiotherapy (IMRT) is the standard of care in definitive chemoradiotherapy (CRT) for anal cancer. Only a limited number of studies have analyzed the clinical results with VMAT (volumetric modulated arc therapy, the advanced form of IMRT). We conducted a retrospective study on patients treated at our institution. We compared the outcomes of VMAT-treated and 3DCRT (3D conformal radiotherapy)-treated patients. VMAT reduced acute toxicities (i.e., primarily dermatitis and enteritis) to a great extent. Additionally, VMAT relevantly improved treatment compliance (i.e., less CRT interruptions/delays, shorter overall treatment time, and higher absolute 5-fluorouracil dose applied). Finally, we found improved cancer-specific survival and distant control in VMAT-treated patients. The present study underlines the great progress that has been achieved with IMRT/VMAT in the CRT of anal cancer. Our study is the first to demonstrate an improvement in treatment compliance and outcomes with VMAT. Future studies could address whether VMAT is advantageous when compared to conventional IMRT. Abstract Background: Intensity-modulated radiotherapy (IMRT) is the standard of care in chemoradiotherapy (CRT) for anal cancer. Until now, only a limited number of studies have analyzed the results with VMAT (volumetric modulated arc therapy). We conducted a retrospective study on patients treated at our institution. Patients and Methods: We included patients who received curative CRT for anal cancer. We compared VMAT-treated and 3DCRT (3D conformal radiotherapy)-treated patients. We analyzed toxicities (acute: CTCAE criteria; late: LENT/SOMA criteria), treatment compliance, overall survival, cancer-specific survival (CSS), distant control (DC), and locoregional control. Results: A total of 149 patients (3DCRT: n = 87, VMAT: n = 62) were included. The median follow-up was longer in 3DCRT-treated patients (3DCRT: 61.3 months; VMAT: 39.1 months; p < 0.05). VMAT-treated patients had more G3 tumors (3DCRT: 12/87 (13.8%); VMAT: 18/62 (29.0%), p < 0.001). VMAT reduced acute toxicities ≥grade 3 (3DCRT: n = 48/87 (55.2%); VMAT: n = 11/62 (17.7%), p < 0.001). VMAT improved treatment compliance (less interruptions/delays) (3DCRT: 37/87, 42.5%; VMAT: 4/62, 6.5%; p < 0.001), provided a shorter median overall treatment time (3DCRT: 41 days; VMAT: 38 days; p = 0.02), and gave a higher median absolute 5-fluorouracil dose (3DCRT: 13,700 mg; VMAT: 14,400 mg; p = 0.001). Finally, we found improved CSS (p = 0.02; 3DCRT: 81.9% at 3 years; VMAT: 94.1% at 3 years) and DC (p = 0.01; 3DCRT: 89.4% at 3 years; VMAT: 100.0% at 3 years) with VMAT. Summary: Our study is the first to demonstrate improved treatment compliance and outcomes with VMAT for anal cancer. Previous studies have indicated that organs at risk sparing might be more improved with the use of VMAT vs. with conventional IMRT. Future studies should address whether these advantages lead to a further reduction in CRT-associated morbidity.
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Affiliation(s)
- Jacqueline Possiel
- Department of Radiotherapy and Radiation Oncology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany; (J.P.); (H.E.A.); (M.G.); (M.A.S.); (S.R.); (M.L.)
| | - Hanne Elisabeth Ammon
- Department of Radiotherapy and Radiation Oncology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany; (J.P.); (H.E.A.); (M.G.); (M.A.S.); (S.R.); (M.L.)
| | - Manuel Guhlich
- Department of Radiotherapy and Radiation Oncology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany; (J.P.); (H.E.A.); (M.G.); (M.A.S.); (S.R.); (M.L.)
| | - Lena-Christin Conradi
- Department of General, Visceral and Pediatric Surgery, University Medical Center Göttingen, 37075 Göttingen, Germany; (L.-C.C.); (M.G.)
| | - Michael Ghadimi
- Department of General, Visceral and Pediatric Surgery, University Medical Center Göttingen, 37075 Göttingen, Germany; (L.-C.C.); (M.G.)
| | - Hendrik Andreas Wolff
- University Medical Center Göttingen, 37075 Göttingen, Germany;
- Department of Radiology, Nuclear Medicine and Radiotherapy, Radiology Munich, 80333 Munich, Germany
- Department of Radiotherapy and Radiation Oncology, University Medical Center Regensburg, 93053 Regensburg, Germany
| | - Markus Anton Schirmer
- Department of Radiotherapy and Radiation Oncology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany; (J.P.); (H.E.A.); (M.G.); (M.A.S.); (S.R.); (M.L.)
| | - Stephan Samel
- Praxis für Koloproktologie und chirurgische Endoskopie, Waldweg 1, 37073 Göttingen, Germany; (S.S.); (M.M.)
| | - Michael Mügge
- Praxis für Koloproktologie und chirurgische Endoskopie, Waldweg 1, 37073 Göttingen, Germany; (S.S.); (M.M.)
| | - Stefan Rieken
- Department of Radiotherapy and Radiation Oncology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany; (J.P.); (H.E.A.); (M.G.); (M.A.S.); (S.R.); (M.L.)
| | - Martin Leu
- Department of Radiotherapy and Radiation Oncology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany; (J.P.); (H.E.A.); (M.G.); (M.A.S.); (S.R.); (M.L.)
| | - Leif Hendrik Dröge
- Department of Radiotherapy and Radiation Oncology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany; (J.P.); (H.E.A.); (M.G.); (M.A.S.); (S.R.); (M.L.)
- Correspondence: ; Tel.: +49-551-398-866
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