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01.01.2016 | Clinical Article - Spine | Ausgabe 1/2016

Acta Neurochirurgica 1/2016

Spinal myxopapillary ependymomas: a retrospective clinical and immunohistochemical study

Zeitschrift:
Acta Neurochirurgica > Ausgabe 1/2016
Autoren:
Xi Chen, Chao Li, Xiaoming Che, Hong Chen, Zhengyan Liu
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1007/​s00701-015-2637-8) contains supplementary material, which is available to authorized users.
Xi Chen and Chao Li contributed equally to this work. The manuscript was written with contributions of all authors. All authors have given approval to the final version of the manuscript.

Abstract

Background

Myxopapillary ependymoma (MPE) is a rare subtype of ependymoma that develops almost exclusively within the spinal cord. Despite its benign biological nature, MPE has a propensity to recur locally or distantly. Although variables influencing the prognosis, such as age, the extent of surgery and radiotherapy, have been widely discussed, no definitive standard has been established. Compared to other spinal tumors, many fewer histological markers have been elucidated to assist the determination of the prognosis.

Methods

Twenty-seven patients who underwent resection of MPE were enrolled. We determined their demographic features, imaging characteristics, clinical presentations and outcomes, surgical procedures and histological properties by chart review, telephone contact, reviewing of surgical notes, pre-/postoperative imaging and immunohistological staining.

Results

GTR (gross total resection) was achieved in 18 patients (66.7 %) and STR (subtotal resection) in 9 (33.3 %). Although GTR rendered a better disease control rate, the difference was not significant. Pediatric patients suffered from a greater risk of recurrence as well as a shorter period to disease relapse. In the majority of cases, we observed the overexpression of platelet-derived growth factor receptor α (PDGFRα), matrix metalloproteinase-2 (MMP2) and matrix metalloproteinase-14 (MMP14). Epidermal growth factor receptor (EGFR) was observed in the tumors of 7 of 23 nonrecurrent patients, but not in any recurrent tumors.

Conclusions

The results of the present study indicate that the extent of resection and age are major factors related to tumor recurrence. Therefore, gross total resection is recommended whenever possible unless following neurological dysfunction is predictable. Moreover, pediatric patients need considerable attention after surgery, particularly in the early stages. PDGFRα, MMP2 and MMP14 may be new diagnostic and therapeutic targets and EGFR a potential predictor of improved prognosis for MPE.

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Zusatzmaterial
ESM 1 Detailed demographic and clinical information (DOCX 31 kb)
701_2015_2637_MOESM1_ESM.docx
Literatur
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