Toxicity after reirradiation of pulmonary tumours with stereotactic body radiotherapy.

Abstract

PURPOSE:

To assess toxicity and feasibility of reirradiation with stereotactic body radiotherapy (SBRT) after prior lung SBRT for primary lung cancer or lung metastases.

PATIENTS AND MATERIALS:

Twenty-nine patients reirradiated with SBRT on 32 lung lesions (11 central, 21 peripheral) were retrospectively reviewed. Median follow-up time was 12 months (range 1-97). The primary endpoint was toxicity, secondary endpoints were local control and overall survival time. Toxicity was scored according to the NCI-CTCAE version 3.

RESULTS:

Grade 3-4 toxicity was scored 14 times in eight patients. Three patients died because of massive bleeding (grade 5). Larger clinical target volumes (CTV) and central tumour localization were associated with more severe toxicity. There was no correlation between mean lung dose (MLD) and lung toxicity. Local control at 5 months after reirradiation was 52%, as assessed by CT-scan (n=12) or X-thorax (n=3). A larger CTV was associated with poorer local control. Kaplan-Meier estimated 1- and 2-year survival rates were 59% and 43%, respectively.

CONCLUSIONS:

Reirradiation with SBRT is feasible although increased risk of toxicity was reported in centrally located tumours. Further research is warranted for more accurate selection of patients suitable for reirradiation with SBRT.

• Authors: Heike Peulen, Kristin Karlsson, Karin Lindberg, Owe Tullgren, Pia Baumann, Ingmar Lax, Rolf Lewensohn, Peter Wersäll
• Journal: Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology (Radiother Oncol) Vol. 101 Issue 2 Pg. 260-6 (Nov 2011) ISSN: 1879-0887 [Electronic] Ireland
• PMID: 22056534 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2011 Elsevier Ireland Ltd. All rights reserved.

Topics

• Adolescent
• Adult
• Aged
• Aged, 80 and over
• Feasibility Studies
• Female
• Follow-Up Studies
• Humans
• Lung Neoplasms (mortality, secondary, surgery)
• Male
• Middle Aged
• Neoplasm Recurrence, Local
• Pneumonectomy
• Radiosurgery (adverse effects)
• Radiotherapy Dosage
• Radiotherapy Planning, Computer-Assisted
• Retreatment
• Retrospective Studies
• Survival Rate