Shinji Yoshioka

Publications (3)0 Total impact

• Source

  Available from: PubMed Central

  Article: Osseous erosion by herniated nucleus pulposus mimicking intraspinal tumor: a case report.

  Shinji Yoshioka, Koichi Sairyo, Toshinori Sakai, Tatsuya Tamura, Hirofumi Kosaka, Natsuo Yasui
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  ABSTRACT: Erosion of spinal osseous structure, so-called scalloping, has been rarely reported associated with herniated nucleus pulposus (HNP). We report a rare case of HNP causing erosion of the spinal osseous structure (including lamina). The patient was an 81-year-old woman with 3-year history of low-back pain and left leg radiating pain. Muscle weakness of the left leg was also apparent. Computed tomography following myelography showed severe compression of the dural sac at the level of L3-L4; furthermore, erosion of the lamina, pedicle, and vertebral body was noted, indicating that the space-occupying mass was most probably a tumorous lesion. The mass also showed calcification inside. During the surgery, the mass was confirmed to be an HNP with calcification. Following resection, the pain disappeared. Surgeons should be aware of the possibility of scalloping of the vertebrae caused by HNP mimicking a tumorous lesion.
  Journal of Orthopaedics and Traumatology 12/2010; 11(4):257-61.
• Source

  Available from: PubMed Central

  Article: Congenital absence of lumbosacral articular facet joint associated with conjoined nerve root: a case report.

  Shinji Yoshioka, Koichi Sairyo, Toshinori Sakai, Natsuo Yasui
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  ABSTRACT: We report a rare case of congenital absence of the L5-S1 facet joint, which was associated with a conjoined nerve root. Combination of these two anomalies has been quite rarely reported in the literature. A 39-year-old man presented with acute low back pain and right leg radiating pain. Muscle weakness and sensory disturbance of the right leg were also apparent in the region innervated by L5 and S1 nerve roots. Preoperative multidetector three-dimensional computed tomography (3D-CT) showed complete absence of the right S1 superior articular process. Magnetic resonance (MR) images showed lumbar disc herniation at right L5-S1 level that migrated cranially. Intraoperative findings revealed that the right L5 nerve root and S1 nerve root were conjoined, and the conjoined nerve root was compressed by L5-S1 disc herniation, which led to impairment of the conjoined nerve root by a single-level lumbar disc herniation. After removal of the disc herniation, his right leg pain immediately subsided, however muscle weakness and sensory disturbance persisted. Surgeons should be aware of this nerve root anomaly when examining a patient who shows an unusual clinical presentation and/or congenital osseous anomaly.
  Journal of Orthopaedics and Traumatology 09/2010; 11(3):183-7.
• Article: An Osteochondroma Limiting Flexion of the Proximal Interphalangeal Joint in Hereditary Multiple Exostosis: a Case Report.

  Shinji Yoshioka, Yoshitaka Hamada, Shinjiro Takata, Hiroaki Takai, Natsuo Yasui
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  ABSTRACT: We describe a patient in which an osteochondroma, which resulted from hereditary multiple exostoses, limited flexion of the proximal interphalangeal (PIP) joint at birth. The tumor grew over the original distal head of the proximal phalanx, and the early appearance of a second ossification center on the base of the middle phalanx was observed. The mass was removed surgically when the patient was 17 months old. There was an improvement in the range of motion at a follow-up evaluation 3 years later. The tumor shape and the growth of the affected PIP joint are examined in detail.
  Hand 10/2009;