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1.  Giant Invasive Sacral Schwannoma Showing Chromosomal Numerical Aberrations [-14,+18,+22] 
Asian Spine Journal  2013;7(3):227-231.
Here, we report on a rare case of a giant invasive sacral schwannoma. The patient was a 58-year-old woman who had a 6-year history of non-specific buttock pain. Histological investigation confirmed the diagnosis of cellular schwannoma. The following numerical aberration was detected using the GTG-banding method for karyotypes: 47,XX,-14,+18,+22. Cytogenetic studies of schwannomas have indicated a complete or partial loss of chromosome 22 as the most common abnormality, but this case is cytogenetically rare because of the recurrence of trisomy 22.
doi:10.4184/asj.2013.7.3.227
PMCID: PMC3779776  PMID: 24066220
Sacrum; Neurilemmoma; Cytogenetics
2.  Minimum 10-Year Follow-up Study of Anterior Lumbar Interbody Fusion for Degenerative Spondylolisthesis: Progressive Pattern of the Adjacent Disc Degeneration 
Asian Spine Journal  2012;6(2):105-114.
Study Design
Retrospective study.
Purpose
The aims of the current study are to evaluate the minimum 10-year follow-up clinical results of anterior lumbar interbody fusion (ALIF) for degenerative spondylolisthesis.
Overview of Literature
ALIF has been widely used as a treatment regimen in the management of lumbar spondylolisthesis. Still much controversy exists regarding the factors that affect the postoperative clinical outcomes.
Methods
The author performed a retrospective review of 20 patients with degenerative spondylolisthesis treated with ALIF (follow-up, 16.4 years). The clinical results were assessed by the Japanese Orthopaedic Association (JOA) score for low back pain, vertebral slip and disc height index on the radiographs.
Results
The mean preoperative JOA score was 7.1 ± 1.8 points (15-point-method). At 1 year, 5 years, and 10 years or more after surgery, the JOA scores were assessed as 12.4 ± 2.2 points, 12.7 ± 2.6 points, 12.0 ± 2.5 points, respectively (excluding the data of reoperated cases). The adjacent disc degeneration developed in all cases during the long-term follow-up. The progressive pattern of disc degeneration was divided into three types. Initially, disc degeneration occurred due to disc space narrowing. After that, the intervertebral discs showed segmental instability with translation at the upper level. But the lower discs showed osteophyte formation, and occasionally lead to the collapse or spontaneous union.
Conclusions
The clinical results of the long-term follow-up data after ALIF became worse due to the adjacent disc degeneration. The progressive pattern of disc degeneration was different according to the adjacent levels.
doi:10.4184/asj.2012.6.2.105
PMCID: PMC3372545  PMID: 22708014
Spondylolisthesis; Lumbar regions; Intervertebral disc disease
3.  The Effectiveness of Gefitinib on Spinal Metastases of Lung Cancer - Report of Two Cases - 
Asian Spine Journal  2008;2(2):109-113.
Lung cancer has a high mortality rate and is often diagnosed at the metastatic stage. Recently, gefitinib, a molecule target therapeutic drug, has offered a new approach for patients with non-small-cell lung cancer (NSCLC). This report describes the effects of gefitinib on bone metastases in two patients with NSCLC. The pain induced by a bone metastasis was relieved after the administration of gefitinib. Furthermore, the radiographs and CT findings showed sclerotic changes that matched those of the metastatic bone tumor after gefitinib administration in both patients. It is believed that gefitinib inhibited tumor cell proliferation and induced normal bone formation. In patients with NSCLC, gefitinib may be effective in the treatment of bone metastases.
doi:10.4184/asj.2008.2.2.109
PMCID: PMC2852086  PMID: 20404966
Gefitinib; Bone metastases; Lung cancer

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