J Neurol Surg B
DOI: 10.1055/s-0039-1694052
Original Article
Georg Thieme Verlag KG Stuttgart · New York

Patient Outcomes after Reirradiation of Small Skull Base Tumors using Stereotactic Body Radiotherapy, Intensity Modulated Radiotherapy, or Proton Therapy

1  Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
5  Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
,
He Wang
1  Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
Courtney Pollard III
1  Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
Theresa Nguyen
1  Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
Houda Bahig
1  Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
Clifton D. Fuller
1  Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
G. Brandon Gunn
1  Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
Adam S. Garden
1  Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
Jay P. Reddy
1  Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
William H. Morrison
1  Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
Shalin Shah
1  Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
David I. Rosenthal
1  Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
Steven J. Frank
1  Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
Nandita Guha-Thakurta
2  Department of Diagnostic Radiology, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
Renata Ferrarotto
3  Department of Thoracic Head and Neck Medical Oncology, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
Ehab Y. Hanna
4  Department of Head and Neck Surgery, Division of Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
Shirley Y. Su
4  Department of Head and Neck Surgery, Division of Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
,
Jack Phan
1  Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, Unites States
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Weitere Informationen

Publikationsverlauf

02. März 2019

11. Juni 2019

Publikationsdatum:
31. Juli 2019 (online)

Abstract

Purpose The aim of this study was to evaluate outcomes of patients who received reirradiation for small skull base tumors utilizing either intensity modulated radiotherapy (IMRT), stereotactic body radiotherapy (SBRT), and proton radiotherapy (PRT).

Methods Patients who received IMRT, SBRT or PRT reirradiation for recurrent or new small skull base tumors (< 60 cc) between April 2000 and July 2016 were identified. Those with < 3 months follow-up were excluded. Clinical outcomes and treatment toxicity were assessed. The Kaplan–Meier method was used to estimate the local control (LC), regional control (RC), distant control (DC), progression free survival (PFS), and overall survival (OS).

Results Of the 75 patients eligible, 30 (40%) received SBRT, 30 (40%) received IMRT, and 15 (20%) received PRT. The median retreatment volume was 28 cc. The median reirradiation dose was 66 Gy in 33 fractions for IMRT/PRT, and 45 Gy in 5 fractions for SBRT. The median time to reirradiation was 41 months. With a median follow-up of 24 months, the LC, RC, DC, PFS, and OS rates were 84%, 79%, 82%, 60%, and 87% at 1 year, and 75%, 72%, 80%, 49%, and 74% at 2 years. There was no difference in OS between radiation modalities. The 1- and 2-year late Grade 3 toxicity rates were 3% and 11% respectively..

Conclusions Reirradiation of small skull base tumors utilizing IMRT, PRT, or SBRT provided good local tumor control and low rates of Grade 3 late toxicity. A prospective clinical trial is needed to guide selection of radiation treatment modalities.

Note

Preliminary data was presented as oral presentations at the Royal Australian and New Zealand College of Radiologists (RANZCR) Annual Scientific Meeting 2017, the Radiological Society of North America (RSNA) 103rd Scientific Assembly and Annual Meeting 2017, and the North American Skull Base Society (NASBS) 28th Annual Meeting 2018.