Hirokazu Fujiwara

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STUDY DESIGN Prospective 10-year follow-up magnetic resonance imaging (MRI) study of patients who underwent anterior cervical decompression and fusion (ACDF) and healthy control subjects. OBJECTIVE To clarify the incidence of adjacent segment degeneration during 10 years after ACDF. SUMMARY OF BACKGROUND DATA There have been few studies which(More)
To investigate the frequency of tandem lumbar and cervical intervertebral disc degeneration in asymptomatic subjects. We evaluated magnetic resonance imaging (MRI) results from 94 volunteers (48 men and 46 women; mean age 48 years) for age-related intervertebral disc degeneration in the lumbar and cervical spine. MRI indicated degenerative changes in the(More)
OBJECTIVES The purpose of this study was to longitudinally evaluate relationships between the incidence of stiff shoulder and sagittal alignments of the cervical spine, age-related changes on magnetic resonance imaging (MRI) and life styles of the subjects. METHODS The subjects were 69 men and 93 women. The mean follow-up period was 11.3 +/- 0.7 years.(More)
There has been no prospective study on age-related changes of the extensor muscles of the cervical spine in healthy subjects. This study was conducted to elucidate any association between the changes in cross-sectional area of the extensor muscles of the cervical spine on MRIs and cervical disc degeneration or the development of clinical symptoms. Sixty-two(More)
BACKGROUND Leukoencephalopathy, cerebral calcifications, and cysts (LCC) is a rare disease that was first reported by Labrune in 1996. A case of adult-onset LCC was successfully followed up for a long period. CASE PRESENTATION A 30-year-old female presented with visual field disturbance and seizure on several occasions. Radiographic images revealed(More)
INTRODUCTION Long-term follow-up studies focusing on the posterior extensor muscles in patients suffering from whiplash injury are scarce. The purpose of this study was to elucidate the changes in the posterior extensor muscles 10 years after whiplash injury. METHODS Twenty-three patients who had suffered from whiplash injury in 1994-1996 and had(More)
STUDY DESIGN Prospective longitudinal study, mean follow-up period; 11.7 +/- 0.8 years was conducted from 1995 to 2007. OBJECTIVE To clarify normal aging process of cervical spine and correlation between progression of disc degeneration and development of clinical symptoms. SUMMARY OF BACKGROUND DATA Aging of the cervical spine can inevitably occur in(More)
Background and Importance Intraosseous schwannoma is a relatively rare clinical entity that typically arises in vertebral and mandibular bone. Intraosseous schwannoma located entirely within the petrous bone is exceedingly rare, and only two cases have been reported to date. Clinical Presentation A 47-year-old Asian man was referred to our hospital with a(More)
Pilocytic astrocytoma (PA) is a low-grade astrocytic tumor arising predominantly during the first two decades of life. Hemorrhagic onset of PAs is uncommon, and the etiology of hemorrhage remains unclear. Here we report a case of hemorrhagic onset of cerebellar PA in a 29-year-old man who presented with a week-long history of headache and gait instability.(More)