Patterns of failure after reirradiation with intensity-modulated radiation therapy and the competing risk of out-of-field recurrences

Danielle N. Margalit, Bhupendra Rawal, Paul J. Catalano, Robert I. Haddad, Laura A. Goguen, Donald J. Annino, Sewanti A. Limaye, Jochen H. Lorch, Annie W. Lavigne, Jonathan D. Schoenfeld, David J. Sher, Roy B. Tishler

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9 Scopus citations

Abstract

Purpose To describe patterns of failure (POF) after reirradiation (reRT) with intensity modulated radiation therapy (IMRT) for recurrent/second primary squamous cell carcinoma of the head and neck. Methods From 08/2004-02/2013, 75 consecutive patients received reRT with IMRT. Gross tumor was generally treated with a 5 mm planning target volume (PTV) margin. For postoperative cases, a 5 mm PTV was added to the clinical target volume which included the postoperative bed. Elective neck coverage was not standard. POF were characterized by correlating the recurrent tumor location on CT-imaging with the reRT IMRT plan. Results Patients received definitive reRT (55%) or postoperative reRT (45%) to a median 60 Gy (range, 59.4–70 Gy). Most patients (88%) received concurrent chemotherapy including induction (16%). The median overall survival was 1.8 years. Isolated local-regional recurrence (LRR) was the most common failure-type (2-year cumulative incidence [CI] 22.5% [95% C.I. 13.6–32.7%]), but concurrent LRR and distant-failure occurred frequently (2-year CI LRR + distant-failure 19.6% [95% C.I. 11.3–29.5%]); isolated distant-failure was rare (2-year CI 5.7% [95% C.I. 1.8–12.8%]). The 2-year in-field control was 65% (95% C.I. 52–81%) reflecting encouraging control within the irradiated target. Patients with gross disease were more likely to recur in-field (p = 0.02), whereas postoperative patients were more likely to recur out-of-field/marginally than in-field (p = 0.02). Conclusions POF after reRT differ when treating gross disease or postoperatively and should be considered when delineating reRT targets. Aggressive local therapy resulted in favorable in-field control, yet there remains a high competing risk of regional and distant micrometastatic disease. Better systemic agents are needed to control clinically occult local-regional and distant disease.

Original languageEnglish (US)
Pages (from-to)19-26
Number of pages8
JournalOral Oncology
Volume61
DOIs
StatePublished - Oct 1 2016

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Keywords

  • Chemotherapy
  • Distant metastases
  • Head and neck cancer
  • Intensity modulated radiation therapy
  • Local regional recurrence
  • Oral cancer
  • Patterns of failure
  • Patterns of recurrence
  • Radiation therapy
  • Recurrent and metastatic
  • Recurrent head and neck cancer
  • Reirradiation
  • Squamous cell carcinoma
  • Surgical salvage

ASJC Scopus subject areas

  • Oral Surgery
  • Oncology
  • Cancer Research

Cite this

Margalit, D. N., Rawal, B., Catalano, P. J., Haddad, R. I., Goguen, L. A., Annino, D. J., Limaye, S. A., Lorch, J. H., Lavigne, A. W., Schoenfeld, J. D., Sher, D. J., & Tishler, R. B. (2016). Patterns of failure after reirradiation with intensity-modulated radiation therapy and the competing risk of out-of-field recurrences. Oral Oncology, 61, 19-26. https://doi.org/10.1016/j.oraloncology.2016.07.012