Tumor volumes and prognosis in laryngeal cancer

Mohamad R. Issa, Stuart E. Samuels, Emily Bellile, Firas L. Shalabi, Avraham Eisbruch, Gregory Wolf

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Tumor staging systems for laryngeal cancer (LC) have been developed to assist in estimating prognosis after treatment and comparing treatment results across institutions. While the laryngeal TNM system has been shown to have prognostic information, varying cure rates in the literature have suggested concern about the accuracy and effectiveness of the T-classification in particular. To test the hypothesis that tumor volumes are more useful than T classification, we conducted a retrospective review of 78 patients with laryngeal cancer treated with radiation therapy at our institution. Using multivariable analysis, we demonstrate the significant prognostic value of anatomic volumes in patients with previously untreated laryngeal cancer. In this cohort, primary tumor volume (GTVP), composite nodal volumes (GTVN) and composite total volume (GTVP + GTVN = GTVC) had prognostic value in both univariate and multivariate cox model analysis. Interestingly, when anatomic volumes were measured from CT scans after a single cycle of induction chemotherapy, all significant prognosticating value for measured anatomic volumes was lost. Given the literature findings and the results of this study, the authors advocate the use of tumor anatomic volumes calculated from pretreatment scans to supplement the TNM staging system in subjects with untreated laryngeal cancer. The study found that tumor volume assessment after induction chemotherapy is not of prognostic significance.

Original languageEnglish (US)
Pages (from-to)2236-2261
Number of pages26
JournalCancers
Volume7
Issue number4
DOIs
StatePublished - Nov 9 2015
Externally publishedYes

Keywords

  • Laryngeal cancer
  • Prognosis
  • Radiation therapy
  • Tumor volume

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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