JaLCDOI 10.18926/AMO/52899
フルテキストURL 68_5_303.pdf
著者 Tanaka, Masato| Sugimoto, Yoshihisa| Arataki, Shinya| Takigawa, Tomoyuki| Ozaki, Toshifumi|
抄録 Spinal deformity is an important clinical manifestation of Chiari I malformation (CM-I) and syringomyelia. Here we report the result of an 8-year follow-up of a 13-year-old girl with severe scoliosis associated with Chiari malformation and a large syringomyelia. The patient presented at our hospital at the age of 13 with a 68° scoliosis. Magnetic resonance imaging showed Chiari malformation and a large syringomyelia. Neurosurgical treatment involved foramen magnum decompression and partial C1 laminectomy, but the scoliosis still progressed. We present the first case report of a rare course of scoliosis in a patient with CM-I and a large syringomyelia.
キーワード Chiari I malformation syringomyelia scoliosis
Amo Type Case Report
発行日 2014-10
出版物タイトル Acta Medica Okayama
68巻
5号
出版者 Okayama University Medical School
開始ページ 303
終了ページ 306
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 CopyrightⒸ 2014 by Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 25338487
Web of Sience KeyUT 000343269300007
JaLCDOI 10.18926/AMO/52786
フルテキストURL 68_4_201.pdf
著者 Endo, Hirosuke| Akazawa, Hirofumi| Mitani, Shigeru| Okada, Yoshiki| Yamane, Kentaro| Ozaki, Toshifumi|
抄録 We reviewed the treatment outcome in 14 hips of 7 patients who were diagnosed as having bilateral developmental dislocation of the hip (DDH) after walking age and could be followed up until they were at least 14 years of age. Based on the results of two-directional arthrography of the hip, closed reduction was performed in 2 hips, and open reduction was performed without osteotomy in 12 hips. The final radiographic evaluations were made according to the Kalamchi and MacEwen classification and Severin classification. The mean age at the initial visit was 1 year and 9 months (range, 1 year and 5 months to 3 years). The outcome was satisfactory for one hip in Group Ⅰ and 2 hips in Group Ⅱ according to the Kalamchi and MacEwen classification, and in 83% of the Severin Class Ⅰ and Ⅱ hips. Arthrography was useful for identifying asymmetry, demonstrating the usefulness of a treatment strategy based on arthrography of the hip.
キーワード developmental dislocation of the hip bilateral case arthrogram open reduction after walking age
Amo Type Original Article
発行日 2014-08
出版物タイトル Acta Medica Okayama
68巻
4号
出版者 Okayama University Medical School
開始ページ 201
終了ページ 206
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 CopyrightⒸ 2014 by Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 25145406
Web of Sience KeyUT 000340687500002
著者 Sakata, Kenichiro| Furumatsu, Takayuki| Miyazawa, Shinichi| Okada, Yukimasa| Fujii, Masataka| Ozaki, Toshifumi|
発行日 2013-01
出版物タイトル International Orthopaedics
37巻
1号
資料タイプ 学術雑誌論文
著者 Yoneda, Yasushi| Ito, Sachio| Kunisada, Toshiyuki| Morimoto, Yuki| Kanzaki, Hirotaka| Yoshida, Aki| Shimizu, Kenji| Ozaki, Toshifumi| Ouchida, Mamoru|
発行日 2013-10-09
出版物タイトル PLoS ONE
8巻
10号
資料タイプ 学術雑誌論文
著者 Shiozaki, Yasuyuki| Kitajima, Takashi| Mazaki, Tetsuro| Yoshida, Aki| Tanaka, Masato| Umezawa, Akihiro| Nakamura, Mariko| Yoshida, Yasuhiro| Ito, Yoshihiro| Ozaki, Toshifumi| Matsukawa, Akihiro|
発行日 2013-04
出版物タイトル International Journal of Nanomedicine
8巻
1号
資料タイプ 学術雑誌論文
JaLCDOI 10.18926/AMO/52012
フルテキストURL 67_6_385.pdf
著者 Tanaka, Masato| Arataki, Shinya| Sugimoto, Yoshihisa| Takigawa, Tomoyuki| Tetsunaga, Tomoko| Ozaki, Toshifumi|
抄録 Craniometaphyseal dysplasia is a rare genetic condition characterized by progressive thickening of bones in the skull and metaphyseal abnormalities in the long bones. This disorder often causes progressively symptomatic cranial nerve compression, but in rare cases foramen magnum stenosis may lead to quadriplegia. Chiari I malformation with craniometaphyseal dysplasia is extremely rare. The authors report on a 25-year-old woman with myelopathy due to Chiari I malformation along with craniometaphyseal dysplasia. There are only four previous case reports of this condition. The authors present here the fifth case report of this rare condition and summarize its characteristics.
キーワード craniometaphyseal dysplasia Chiari malformation cervicomedullary compression
Amo Type Case Report
発行日 2013-12
出版物タイトル Acta Medica Okayama
67巻
6号
出版者 Okayama University Medical School
開始ページ 385
終了ページ 389
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 CopyrightⒸ 2013 by Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 24356723
Web of Sience KeyUT 000328915700007
JaLCDOI 10.18926/AMO/52008
フルテキストURL 67_6_351.pdf
著者 Yokoyama, Yusuke| Abe, Nobuhiro| Fujiwara, Kazuo| Suzuki, Masahiko| Nakajima, Yoshikazu| Sugita, Naohiko| Mitsuishi, Mamoru| Nakashima, Yoshio| Ozaki, Toshifumi|
抄録 A computer-assisted navigation system to be used for total knee arthroplasties (TKAs) was reported to improve the accuracy of bone resection and result in precise implant placement, but the concomitant surgical invasion and time consumption are clinical problems. We developed a computed tomography (CT)-based navigation system (NNS) to be used for minimally invasive TKA. It requires only the reference points from a small limited area of the medial femoral condyle and proximal tibia through a skin incision to obtain optical images. Here we evaluated the usefulness and accuracy of the NNS in comparison with the commercially available BrainLAB image-free navigation system (BLS). In a clinical experiment, the registration times obtained with the NNS tended to be shorter than those obtained with the BLS, but not significantly so. The NNS group tended to be in the extended position in the sagittal plane of the distal femur within 3 degrees, and the BLS group showed rather flexed deviation in the sagittal plane of the anterior femur.
キーワード total knee arthroplasty navigation system minimally invasive surgery
Amo Type Original Article
発行日 2013-12
出版物タイトル Acta Medica Okayama
67巻
6号
出版者 Okayama University Medical School
開始ページ 351
終了ページ 358
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 CopyrightⒸ 2013 by Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 24356719
Web of Sience KeyUT 000328915700003
関連URL http://ousar.lib.okayama-u.ac.jp/metadata/52515
JaLCDOI 10.18926/AMO/52007
フルテキストURL 67_6_343.pdf
著者 Yamane, Kentaro| Takigawa, Tomoyuki| Tanaka, Masato| Osaki, Syuhei| Sugimoto, Yoshihisa| Ozaki, Toshifumi|
抄録 Cervical spinal schwannoma is benign, and outcomes after surgical resection are generally excellent. A surgical dilemma sometimes arises as to whether to perform total tumor removal, which carries a risk of sacrificing the nerve root, or subtotal removal, where the risk can be tumor recurrence. The purpose of this study was to identify factors with the potential to predict clinical impairment after surgery for cervical spinal schwannomas. Thirty cases of cervical schwannomas treated surgically in our institute were retrospectively reviewed;initial symptoms, tumor location, Eden classification, surgical method, functional outcome, and tumor recurrence were investigated. All permanent motor deficits were the result of resecting functionally relevant nerve roots (i.e., C5-8). The rate of permanent sensory deficit was 11% after C1-4 nerve root resection, and 67% after C5-8 nerve root resection. Permanent neurological deficits occurred in 14% of patients younger than 40 years and 38% of those older than 40. Dumbbell tumors were associated with the need for total or ventral nerve root transection, as well as with a high incidence of tumor recurrence. The incidence of permanent neurological deficit was significantly higher in patients undergoing C5-8 nerve root resection, and tended to be higher in those over 40.
キーワード cervical spinal schwannoma neurological deficit nerve root resection tumor resection tumor recurrence
Amo Type Original Article
発行日 2013-12
出版物タイトル Acta Medica Okayama
67巻
6号
出版者 Okayama University Medical School
開始ページ 343
終了ページ 349
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 CopyrightⒸ 2013 by Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 24356718
Web of Sience KeyUT 000328915700002
著者 Kikuchi, Takeshi| Kubota, Satoshi| Asaumi, Koji| Kawaki, Harumi| Nishida, Takashi| Kawata, Kazumi| Mitani, Shigeru| Tabata, Yasuhiko| Ozaki, Toshifumi| Takigawa, Masaharu|
発行日 2008-06
出版物タイトル Tissue Engineering Part A
14巻
6号
資料タイプ 学術雑誌論文
JaLCDOI 10.18926/AMO/51867
フルテキストURL 67_5_311.pdf
著者 Nishida, Keiichiro| Hashizume, Hiroyuki| Matsukawa, Akihiro| Hashizume, Kenzo| Shimamura, Yasunori| Torigoe, Yasuyuki| Ozaki, Toshifumi|
抄録 We report a case of 4th metacarpal head collapse of a 19-year-old healthy man. MRI revealed T1 low and T2 high regions in the collapsed 4th metacarpal head, as well as in the right 3rd and left 4th metacarpal head. Our initial diagnosis was occult compression fracture due to avascular necrosis, known as Dieterich's disease. However, pathological findings of surgically resected right 4th metacarpal head were compatible with transient osteoporosis and metacarpal head fracture followed by active tissue repair. The autologous osteochondral transplants from costchondral junction survived and maintained their size and shape even at 10-year follow-up.
キーワード occult compression fracture metacarpal head avascular necrosis osteochondral autograft
Amo Type Case Report
発行日 2013-10
出版物タイトル Acta Medica Okayama
67巻
5号
出版者 Okayama University Medical School
開始ページ 311
終了ページ 317
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 CopyrightⒸ 2013 by Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 24145731
Web of Sience KeyUT 000325836100005
著者 Kinami, Yo| Noda, Tomoyuki| Ozaki, Toshifumi|
発行日 2013-05
出版物タイトル Journal of Orthopaedic Science
18巻
3号
資料タイプ 学術雑誌論文
著者 Hasei, Joe| Sasaki, Tsuyoshi| Tazawa, Hiroshi| Osaki, Shuhei| Yamakawa, Yasuaki| Kunisada, Toshiyuki| Yoshida, Aki| Hashimoto, Yuuri| Onishi, Teppei| Uno, Futoshi| Kagawa, Shunsuke| Urata, Yasuo| Ozaki, Toshifumi| Fujiwara, Toshiyoshi|
発行日 2013-03
出版物タイトル Molecular Cancer Therapeutics
12巻
3号
資料タイプ 学術雑誌論文
著者 Furumatsu, Takayuki| Matsumoto, Emi| Kanazawa, Tomoko| Fujii, Masataka| Lu, Zhichao| Kajiki, Ryotaro| Ozaki, Toshifumi|
発行日 2013-05-31
出版物タイトル Journal of Biomechanics
46巻
9号
資料タイプ 学術雑誌論文
JaLCDOI 10.18926/AMO/49670
フルテキストURL 67_2_113.pdf
著者 Sugimoto, Yoshihisa| Tanaka, Masato| Gobara, Hideo| Misawa, Haruo| Kunisada, Toshiyuki| Ozaki, Toshifumi|
抄録 We report on 2 patients who experienced injury to one of their lumbar arteries related to pedicle screw misplacement. In this report, the lumbar pedicle screw holes were made laterally with resultant injury to the lumbar artery. During surgery, arterial bleeding was controlled with pressure and gauze; however, the patients experienced vital shock after surgery. Vital shock ensued and they were rescued by catheter embolization. If patients receiving lumbar instrumentation surgery experience severe anemia or vital shock postoperatively, the surgeon should assume lumbar artery injury as a differential diagnosis.
キーワード catheter embolization complication lumbar artery injury pedicle screw
Amo Type Case Report
発行日 2013-04
出版物タイトル Acta Medica Okayama
67巻
2号
出版者 Okayama University Medical School
開始ページ 113
終了ページ 116
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 CopyrightⒸ 2013 by Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 23603928
Web of Sience KeyUT 000317801700006
JaLCDOI 10.18926/AMO/49259
フルテキストURL 67_1_65.pdf
著者 Sakata, Kenichiro| Furumatsu, Takayuki| Abe, Nobuhiro| Miyazawa, Shinichi| Sakoma, Yoshimasa| Ozaki, Toshifumi|
抄録 Bone marrow-stimulating techniques such as microfracture and subchondral drilling are valuable treatments for full-thickness cartilage defects. However, marrow stimulation-derived reparative tissues are not histologically well-documented in human osteoarthritis. We retrospectively investigated cartilage repairs after marrow stimulation for the treatment of large cartilage defects in osteoarthritic knees. Tissues were obtained from patients who underwent total knee arthroplasty (TKA) after arthroscopic marrow stimulation in medial compartmental osteoarthritis. Clinical findings and cartilage repair were assessed. Sections of medial femoral condyles were histologically investigated by safranin O staining and anti-type II collagen antibody. Marrow stimulation decreased the knee pain in the short term. However, varus leg alignment gradually progressed, and TKA conversions were required. The grade of cartilage repair was not improved. Marrow stimulations resulted in insufficient cartilage regeneration on medial femoral condyles. Safranin O-stained proteoglycans and type II collagen were observed in the deep zone of marrow-stimulated holes. This study demonstrated that marrow stimulation resulted in failed cartilage repair for the treatment of large cartilage defects in osteoarthritic knees. Our results suggest that arthroscopic marrow stimulation might not improve clinical symptoms for the long term in patients suffering large osteoarthritic cartilage defects.
キーワード bone marrow stimulation microfracture subchondral drilling osteoarthritis of the knee cartilage repair
Amo Type Case Report
発行日 2013-02
出版物タイトル Acta Medica Okayama
67巻
1号
出版者 Okayama University Medical School
開始ページ 65
終了ページ 74
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 CopyrightⒸ 2013 by Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 23439511
Web of Sience KeyUT 000316829900009
JaLCDOI 10.18926/AMO/49255
フルテキストURL 67_1_35.pdf
著者 Watanabe, Masutaka| Arita, Seizaburo| Hashizume, Hiroyuki| Honda, Mitsugi| Nishida, Keiichiro| Ozaki, Toshifumi|
抄録 The purpose of this study was to quantitatively evaluate Akahori's preoperative classification of cubital tunnel syndrome. We analyzed the results for 57 elbows that were treated by a simple decompression procedure from 1997 to 2004. The relationship between each item of Akahori's preoperative classification and clinical stage was investigated based on the parameter distribution. We evaluated Akahori's classification system using multiple regression analysis, and investigated the association between the stage and treatment results. The usefulness of the regression equation was evaluated by analysis of variance of the expected and observed scores. In the parameter distribution, each item of Akahori's classification was mostly associated with the stage, but it was difficult to judge the severity of palsy. In the mathematical evaluation, the most effective item in determining the stage was sensory conduction velocity. It was demonstrated that the established regression equation was highly reliable (R=0.922). Akahori's preoperative classification can also be used in postoperative classification, and this classification was correlated with postoperative prognosis. Our results indicate that Akahori's preoperative classification is a suitable system. It is reliable, reproducible and well-correlated with the postoperative prognosis. In addition, the established prediction formula is useful to reduce the diagnostic complexity of Akahori's classification.
キーワード cubital tunnel syndrome ulnar nerve Akahoriʼs classification multiple regression analysis
Amo Type Original Article
発行日 2013-02
出版物タイトル Acta Medica Okayama
67巻
1号
出版者 Okayama University Medical School
開始ページ 35
終了ページ 44
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 CopyrightⒸ 2013 by Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 23439507
Web of Sience KeyUT 000316829900005
関連URL http://ousar.lib.okayama-u.ac.jp/metadata/50647
JaLCDOI 10.18926/AMO/49047
フルテキストURL 66_6_499.pdf
著者 Sugimoto, Yoshihisa| Tanaka, Masato| Nakahara, Ryuichi| Misawa, Haruo| Kunisada, Toshiyuki| Ozaki, Toshifumi|
抄録 An 11 year-old girl had 66 degrees of kyphosis in the thoracolumbar junction. For the purpose of planning for kyphosis correction, we created a 3-D, full-scale model of the spine and consulted spinal navigation. Three-dimensional models are generally used as tactile guides to verify the surgical approach and portray the anatomic relations specific to a given patient. We performed posterior fusion from Th10 to L3, and vertebral column resection of Th12 and L1. Screw entry points, directions, lengths and diameters were determined by reference to navigation. Both tools were useful in the bone resection. We could easily detect the posterior element to be resected using the 3D model. During the anterior bony resection, navigation helped us to check the disc level and anterior wall of the vertebrae, which were otherwise difficult to detect due to their depth in the surgical field. Thus, the combination of navigation and 3D models helped us to safely perform surgery for a patient with complex spinal deformity.
キーワード congenital scoliosis kyphosis navigation 3-dimensional models
Amo Type Case Report
発行日 2012-12
出版物タイトル Acta Medica Okayama
66巻
6号
出版者 Okayama University Medical School
開始ページ 499
終了ページ 502
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 CopyrightⒸ 2012 by Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 23254585
Web of Sience KeyUT 000312966100010
JaLCDOI 10.18926/AMO/49043
フルテキストURL 66_6_469.pdf
著者 Shiozaki, Yasuyuki| Ito, Yasuo| Sugimoto, Yoshihisa| Tomioka, Masao| Shimokawa, Tetsuya| Mazaki, Tetsuro| Koshimune, Koichiro| Tanaka, Masato| Ozaki, Toshifumi|
抄録 In this study, we studied the relationship between fracture patterns and motor function recovery in 70 consecutive patients with cervical spinal cord injury. Fractures were categorized into 6 fracture types and subdivided into stages according to the Allen-Ferguson classification system:compressive flexion (CF), distractive flexion (DF), compressive extension (CE), distractive extension (DE), vertical compression (VC) and lateral flexion (LF). Paralysis was evaluated using the American Spinal Injury Association (ASIA) impairment scale at the time of injury and 3 months afterwards. The residual rate of complete motor palsy (ASIA grade A or B) at the final examination was higher in those patients with DE fractures than those with CF, DF or CE. The final outcomes were as follows. Of the 14 patients who were classified with CF fractures, residual palsy was frequently seen in patients who had stage 5 injury. Of the 27 patients with DF fractures, residual palsy occurred in about half of the patients who had stage 4 or 5 injury. Of the 18 patients with CE fractures, residual palsy occurred in half of the patients with stage 3 injury or higher. Finally, of the 7 patients with DE fractures, the rate of residual palsy was high even for the stage 1 and 2 cases;indeed, all DE patients who had complete motor palsy at the first examination had residual palsy at the final examination. Accordingly, we conclude that motor recovery may be related to fracture pattern.
キーワード cervical spinal cord injury motor function recovery fracture patterns
Amo Type Original Article
発行日 2012-12
出版物タイトル Acta Medica Okayama
66巻
6号
出版者 Okayama University Medical School
開始ページ 469
終了ページ 473
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 CopyrightⒸ 2012 by Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 23254581
Web of Sience KeyUT 000312966100006
JaLCDOI 10.18926/AMO/48692
フルテキストURL 66_4_363.pdf
著者 Tanaka, Masato| Sugimoto, Yoshihiro| Misawa, Haruo| Takigawa, Tomoyuki| Kunisada, Toshiyuki| Ozaki, Toshifumi|
抄録 Spinal deformity is an important clinical manifestation after surgery for spinal cord tumors. One-third of patients who receive laminectomies and irradiation of the spinal column develop scoliosis, kyphosis, or kyphoscoliosis. Recent reports indicate good results after scoliosis surgery using segmental pedicle screws and a navigation system, but these reported studies have not included surgery for post-laminectomy kyphosis. Hooks and wires are ineffective in such patients who undergo laminectomy, and there are also high perioperative risks with insertion of pedicle screws because landmarks have been lost. Here, we report on the 5-year follow-up of a 13-year-old male patient with post-laminectomy and post-irradiation thoracic kyphoscoliosis after surgical treatment of spinal astrocytoma. Posterior segmental pedicle screw fixation was performed safely using a computer-assisted technique. The authors present the first case report for treatment of this condition using a navigation system.
キーワード astrocytoma scoliosis kyphoscoliosis navigation segmental pedicle screw fixation
Amo Type Case Report
発行日 2012-08
出版物タイトル Acta Medica Okayama
66巻
4号
出版者 Okayama University Medical School
開始ページ 363
終了ページ 368
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 CopyrightⒸ 2012 by Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 22918210
Web of Sience KeyUT 000307918900010
著者 佐々木 剛| 田澤 大| 長谷井 嬢| 国定 俊之| 吉田 晶| 橋本 悠里| 矢野 修也| 吉田 亮介| 宇野 太| 香川 俊輔| 森本 裕樹| 浦田 泰生| 藤原 俊義| 尾﨑 敏文|
発行日 2012-08-01
出版物タイトル 岡山医学会雑誌
124巻
2号
資料タイプ 学術雑誌論文