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On-line Access: 2011-07-04

Received: 2010-11-20

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Crosschecked: 2011-06-12

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Journal of Zhejiang University SCIENCE B 2011 Vol.12 No.7 P.575-581


Unilateral hemilaminectomy for patients with intradural extramedullary tumors

Author(s):  Cai-xing Sun, Xu-li Meng, Shang-nao Xie, Yang Yu, Hong-jian Yang, Bin Wu

Affiliation(s):  Zhejiang Traditional Medical University, Hangzhou 310009, China, Department of Neurooncology, Zhejiang Cancer Hospital, Hangzhou 310009, China

Corresponding email(s):   mxlmail@126.com

Key Words:  Hemilaminectomy, Spinal cord tumors, Microsurgery

Cai-xing Sun, Xu-li Meng, Shang-nao Xie, Yang Yu, Hong-jian Yang, Bin Wu. Unilateral hemilaminectomy for patients with intradural extramedullary tumors[J]. Journal of Zhejiang University Science B, 2011, 12(7): 575-581.

@article{title="Unilateral hemilaminectomy for patients with intradural extramedullary tumors",
author="Cai-xing Sun, Xu-li Meng, Shang-nao Xie, Yang Yu, Hong-jian Yang, Bin Wu",
journal="Journal of Zhejiang University Science B",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Unilateral hemilaminectomy for patients with intradural extramedullary tumors
%A Cai-xing Sun
%A Xu-li Meng
%A Shang-nao Xie
%A Yang Yu
%A Hong-jian Yang
%A Bin Wu
%J Journal of Zhejiang University SCIENCE B
%V 12
%N 7
%P 575-581
%@ 1673-1581
%D 2011
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B1000402

T1 - Unilateral hemilaminectomy for patients with intradural extramedullary tumors
A1 - Cai-xing Sun
A1 - Xu-li Meng
A1 - Shang-nao Xie
A1 - Yang Yu
A1 - Hong-jian Yang
A1 - Bin Wu
J0 - Journal of Zhejiang University Science B
VL - 12
IS - 7
SP - 575
EP - 581
%@ 1673-1581
Y1 - 2011
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B1000402

A modified hemilaminectomy was introduced in an attempt to explore the operative techniques and the values of the limited approach to spinal cord tumors. Forty-five consecutive patients with intradural extramedullary lesions, who underwent modified hemilaminectomy, were studied retrospectively. The intraspinal tumors were removed via the limited bone window with a 3.3-cm mean length (range: 2.0–6.5 cm) and a 1.2-cm mean width (range: 0.6–1.5 cm), in which the inner parts of the medial and lateral laminae were mostly undercut for wider view. Spinal lesions were cervical in 21 cases, thoracic in 12 cases, lumbar in 10 cases, and multiple in 2 cases. Forty-three cases were completely excised via hemilaminectomy alone. Two subjects with dumbbell neurinoma underwent two-stage tumor removal via anterolateral cervical approach following hemilaminectomy. With respect to neurological status, the percentage of good Frankel scale (D+E grade) was markedly improved from 22.2% on admission to 93.3% at follow-up. At the median 26-month follow-up evaluation by magnetic resonance imaging (MRI), none of the subjects showed spinal deformity or instability. By preserving musculoligamentous attachments and posterior bony elements as much as possible, the modified approach is minimally invasive and may be routinely used to remove intradural and extramedullary tumors, especially in patients with meningiomas and neurinomas.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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