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Biomedical subjects

Kazutoshi Hida

Publications and source records attributed to Kazutoshi Hida.

44 records · Page 3Linked to original sources
PubMed2002

Corpectomy: a direct approach to perimedullary arteriovenous fistulas of the anterior cervical spinal cord.

OBJECT: In this report, the authors describe five consecutive patients with cervical perimedullary arteriovenous fistulas (AVFs) that were successfully treated using a corpectomy performed via an anterior approach. METHODS: Five patients with cervical perimedullary AVF underwent corpectomy via an anterior approach. There were four women and one man who ranged in age from 34 to 62 years (median 55 years). Four patients presented with subarachnoid hemorrhage and one with intramedullary hemorrhage. All five AVFs were located on the anterior surface of the cervical spinal cord and fed by the anterior spinal artery. All patients underwent an anterior approach with 1.5- or two-level corpectomy, opening of the dura mater, and coagulation of the fistula. After dural closure, an iliac bone graft was inserted. Four patients were treated by surgery alone and one patient by embolization and surgery. Postoperative angiography revealed complete disappearance of the AVF in all patients. Neurological status improved in two cases and stabilized in the other three. There were no surgery-related complications. CONCLUSIONS: Safe and effective interruption of cervical AVFs can be accomplished by an anterior-approach corpectomy.

Adult↗
PubMed2002

[Achondroplasia with respiratory disturbance: case report].

Achondroplasia often accompanies stenosis of both the foramen magnum and the upper cervical spinal canal. Most infants die as a result of respiratory disturbance, including upper airway obstruction, chest deformity, and compression of the cervicomedullary junction. Especially, young patients under 4 years old sometimes suffered sudden death. Therefore, we think it is necessary to perform preventive surgery when the patient's cervicomedullary junction is compressed markedly even if the symptom is mild. The patient is a 2-year-old girl. She has experienced mild respiratory disturbance since she was born. MRI showed the foramen magnum was narrowed and there was high signal intensity in her cervicomedullary junction. We performed foramen magnum decompression. After the surgery, her respiratory function improved and MRI disclosed her foramen magnum was well decompressed.

Achondroplasia↗
PubMed2002

[Intramedullary spinal cord metastasis: two case reports and literature review].

Intramedullary spinal cord metastasis was thought to be rare, but the advent of MR imaging and treatment for malignancy have revealed that it is more frequent than we previously thought. We report two cases of intramedullary spinal cord metastasis from lung and rectal colon carcinoma. Their symptoms were aggravated rapidly. We performed surgical treatment in both cases; one was grosstotal and the other was subtotal resection. After the operation, symptoms improved mildly in one patient and worsened in the other patient. Both died 3 months after surgery, because of respiratory disturbance due to brain stem compression and lung metastasis. In conclusion, MRI is highly useful for making a diagnosis of intramedullary spinal metastatic tumors. However, it is still difficult to treat such a patient by surgery alone. Further postoperative adjuvant therapy will be necessary to improve the prognosis of such patients.

Aged↗
PubMed2002

[Associated meningioma and neurofibroma at the same cervical level without clinical signs of neurofibromatosis: case report].

A 59-year-old woman presented with a history of progressive clumsiness and numbness in both hands. MRI suggested a solid mass extending, from the intradural extramedullary, extradurally at the left C1/2 level. However, intraoperative findings revealed the both the intradural tumor and the extradural tumor existed separately. Histopathological findings revealed coincident meningioma (intradural) and neurofibroma (extradural). These lesions were not associated with neurofibromatosis, and the patient did not have other tumors in either the brain or at other levels of the spine. The occurrence of different types of spinal tumors without clinical signs of neurofibromatosis is very rare. Only five cases have been reported in the literature. To our knowledge, this is the first case of occurrence of different types of spinal tumors at the same level.

Cervical Vertebrae↗
PubMed2002

[Giant, invasive sacral schwannoma extending to the 4th lumbar spine].

In this report, we describe a case with giant sacral schwannoma, which invasively extended to the 4th lumbar spine and to the surrounding sacral and iliac bone. A 26-year-old female was admitted to our hospital because of numbness and transient weakness of the right leg, and dysuria. Radiological examinations revealed that a giant sacral tumor, associated with multiple cystic formations, had invasively extended to the 4th lumbar spine, sacrum, and iliac bone. She underwent partial removal of the tumor, followed by irradiation. Pathological diagnosis was schwannoma. Subsequently, she underwent a second operation because of tumor regrowth 15 months later, and the tumor was totally removed. Numbness of the right leg resolved after surgery. No tumor recurrence has been noted during 5-year follow-up period. Previously, only 5 cases have been reported of invasive sacral schwannoma extending to the lumbar spine. Our experience in this rare case strongly suggests that aggressive resection should be aimed to improve long-term outcome.

Adult↗
PubMed2002

[Surgical approach for non-neoplastic intramedullary lesions].

There are many non-neoplastic intramedullary lesions that mimic intramedullary neoplasm. They are consisted of demyelination, granulomatous disease, infections, radiation myelopathy, vascular lesions, and syringomyelia. In this report, the authors described its differential diagnosis in clinical and neuroradiological findings. Furthermore, we mentioned its surgical approach for several non-neoplastic lesions. Syringomyelia and spinal AV fistula are both good candidate of surgical treatments. We would like to stress that good cooperation between neurologist, neuroradiologist, and neurosurgeon is important to differentiate non-neoplastic lesions and surgical biopsy is final procedure to confirm their pathology.

Humans↗
PubMedDate not supplied

CT angiography with multidetector-row helical CT in spinal arteriovenous malformation.

We performed intravenous CT angiography using multidetector-row helical computed tomography (MDCT) in a 63-year-old man with spinal arteriovenous malformation (AVM). The CT angiography demonstrated feeding arteries, varix-like structure, draining veins and their relationship to the spinal cord. Although selective angiography is essential in planning treatment for spinal AVMs as well as in establishing the diagnosis of the disease, CT angiography can be a good supplementary technique for visualizing precise location of abnormal vessels in a certain case of spinal AVM.

Angiography↗