Kazuki Yamamoto

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Traumatic knee dislocations are severe injuries that involve damage to the anterior cruciate ligament, the posterior cruciate ligament, and the lateral or medial ligamentous structures. There are no established methods of treatment. The objective of the current study was to report the clinical outcome of a two-stage autologous reconstruction on nine knees(More)
STUDY DESIGN A retrospective study to evaluate the results of single-level posterior lumbar interbody fusion (PLIF) using the Brantigan I/F cage (DePuy AcroMed Corp., Raynham, MA) filled with a mixture of local morselized autologous bone and bioactive ceramic granules. OBJECTIVES To report the clinical and radiologic results of PLIF using the Brantigan(More)
OBJECTIVE AND IMPORTANCE Presacral meningocele in hereditary sacral agenesis is a complex and unusual spinal dysgenetic syndrome. Recognition of the syndromic triad, its natural history, and familial presentation has important practical applications for the management of this disease as well as its complications. CLINICAL PRESENTATION This report concerns(More)
BACKGROUND The incidence, morphologic characteristics, and cross-sectional area of meniscofemoral ligaments of the knee are still not clarified. HYPOTHESIS The incidence of meniscofemoral ligaments is very high, and they contribute significantly to the cross-sectional area of the posterior cruciate ligament complex. STUDY DESIGN Descriptive laboratory(More)
Intracranial capillary hemangiomas are very rare, though several spinal capillary hemangiomas have recently been reported. We report here a case of intracranial capillary hemangioma with multiple cysts and review the current literature of similar cases. A 4-month-old girl was referred to our hospital for treatment of hydrocephalus and a cerebellar mass(More)
Intraorbital schwannoma is a rare tumor that constitutes approximately 1%-8% of all orbital tumors. The authors report a case of orbital schwannoma in a 5-year-old boy who was admitted to their institute with exophthalmos and ptosis of the right eye. Computed tomography scanning and MR imaging revealed a retroocular mass in the right orbit. The tumor was(More)
Fronto-facial monobloc advancement is one of the most rewarding procedures for upper and mid-face reconstruction in patients with craniosynostosis. However, it has challenging aspects. Epidural abscess and frontal bone necrosis after retrofrontal dead space is one of the major complications and has led many experienced surgeons not to continue with the(More)
PURPOSE We introduce our technique (a new route for the graft) of endoscopic posterior cruciate ligament (PCL) reconstruction and describe the advantages in comparison with the conventional surgical technique. TYPE OF STUDY Nonrandomized control study. METHODS The idea of this surgical technique is to minimize graft angulation at the inner edge of the(More)
A 5-month-old boy presented with a rare case of intramedullary teratoma extending from T1 to S5 and associated with a lumbosacral lipoma. Magnetic resonance imaging showed the tumor extended over the lipoma. Since the tumor could not be clearly demarcated from the spinal cord, surgery was performed under a preoperative diagnosis of spinal glioma. The lack(More)
A 33-year-old male presented with syncopal attacks. He had a history of slowly progressive deterioration of visual acuity in both eyes. His visual deterioration began in the left eye at age 12 years and in the right eye at age 20 years. His left eye was completely blind by age 33 years. He had received no prior treatment for these visual disturbances.(More)