Abstract
Astrocytomas affect a significant portion of patients with intramedullary tumors. These infiltratively growing tumors are treated by a variety of methods—biopsy and decompressive surgery, maximal safe resection, adjuvant oncological therapy. Also, numerous prognostic factors are reported in the literature. Better understanding of factors that influence prognosis may help in treatment planning with the goal of prolonging survival. We have thus undertaken an extensive literature review in order to define factors affecting prognosis. A total of 38 articles were studied. Only tumor grade was consistently reported as the major factor affecting prognosis. The influence of other clinical factors (age, gender, history length, functional status, tumor location or extent, syrinx or cyst presence) can be speculated upon, but cannot be assessed adequately from the available literature. For both low- and high-grade (HG) astrocytomas, maximal safe tumor resection should be the primary treatment objective but is often not feasible in contrast to other intramedullary and spinal neoplasms. Since the biological nature of spinal cord HG glioma is identical to that of the brain, the same treatment algorithm of maximal safe resection followed by concomitant radio- and chemotherapy would be sensible to implement.
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Abbreviations
- IMSCT:
-
Intramedullary spinal cord tumor
- LG:
-
Low grade
- IMG:
-
Intermediate grade
- HG:
-
High grade
- WHO:
-
World Health Organization
- GTR:
-
Gross total resection
- STR:
-
Subtotal resection
- PR:
-
Partial resection
- Bio:
-
Biopsy
- PFS:
-
Progression-free survival
- OS:
-
Overall survival
- CSS:
-
Cause-specific survival
- LC:
-
Local control
- EOR:
-
Extent of resection
- RT:
-
Radiotherapy
- CHT:
-
Chemotherapy
- MRI:
-
Magnetic resonance imaging
- FU:
-
Follow-up
- MM:
-
Morbidity and mortality
- NR:
-
Not reported
- NS:
-
Not significant
- KPS:
-
Karnofsky Performance Status
- HR:
-
Hazard ratio
- aHR:
-
Adjusted hazard ratio
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Acknowledgments
The authors would like to express their gratitude to the library service of Regional Hospital Liberec, particulary to E. Machonská and J. Klímová, for their help in obtaining full text versions of numerous articles cited in this paper.
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Concurrently with revision submission (and subsequent acceptance) of this article, the largest series of intramedullary astrocytomas to date appeared on Medline (Minehan KJ, Brown PD, Scheithauer BW, Krauss WE, Wright MP (2009) Prognosis and treatment of spinal cord astrocytoma. Int J Radiat Oncol Biol Phys 73: 727–733). Although the authors are aware of this study, due to this unfortunate timing, this series was not included in the review and readers are kindly asked to turn their attention to it.
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Beneš, V., Barsa, P., Beneš, V. et al. Prognostic factors in intramedullary astrocytomas: a literature review. Eur Spine J 18, 1397–1422 (2009). https://doi.org/10.1007/s00586-009-1076-8
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DOI: https://doi.org/10.1007/s00586-009-1076-8