Clinical outcome and prognostic factors of malignant spinal dumbbell tumors

Yoshihiro Matsumoto, Kenichi Kawaguchi, Jun-Ichi Fukushi, Makoto Endo, Nokitaka Setsu, Keiichiro Iida, Satoshi Baba, Hirokazu Saiwai, Akinobu Matsushita, Mitsumasa Hayashida, Seiji Okada, Yasuharu Nakashima

Research output: Contribution to journalArticlepeer-review


Introduction: To investigate the clinical outcome and prognostic factors of malignant spinal dumbbell tumors (m-SDTs). Methods: We retrospectively reviewed the clinical outcome of 22 consecutive cases of m-SDTs and analyzed the prognostic factors associated with worse outcome. Results: Nineteen of the 22 cases were managed with surgery (86%), and gross total resection (GTR) was achieved in four cases (21%). The duration of overall survival (OS) ranged from 3 to 140 months, with a median survival time of 15.3 months. The 5 year OS rate was 55.6%. In multivariate analysis, histological subtype (high-grade malignant peripheral nerve sheath tumor) (hazard ratio [HR] 14.9, p = 0.0191), GTR (HR 0.07, p = 0.0343), and presence of local recurrences (HR 11.2, p = 0.0479) were significant and independent predictors of OS. Conclusions: On the basis of clinical data, we propose that GTR and prevention of local recurrence may improve the clinical outcome of m-SDTs.

Original languageEnglish
Pages (from-to)317-323
Number of pages7
JournalSpine Surgery and Related Research
Issue number4
Publication statusPublished - 2018

All Science Journal Classification (ASJC) codes

  • Surgery
  • Orthopedics and Sports Medicine
  • Clinical Neurology


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