[Postherpetic neuralgia].
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Herpes Zoster↗
Biomedical subjects
Yutaka Tanabe
Publications and source records attributed to Yutaka Tanabe.
[A case of intractable lower limb pain treated successfully by spinal cord stimulation with an electrode inserted retrogradely].
We experienced a case of intractable lower limb pain successfuly treated by spinal cord stimulation with an electrode inserted retrogradely. The patient is a 32 year-old-man suffering from intractable lower limb pain on the area innervated by the sciatic nerve from unidentified cause for about 4 years. We tried various treatments such as epidural block, S 1 nerve-root block including thermocoagulation technique, opiate. Nevertheless, his pain became worse further. Therefore, 6 years after the onset of the symptom, we tried to stimulate electrically the nerve with an electrode inserted retrogradely. This method of spinal cord stimulation produced enough pain reduction. The method of retrograde insertion of an electrode for spinal cord stimulation seems to be a good way to treat intractable pain of the area innervated by a single spinal nerve.
Adult↗
[Complex regional pain syndrome type I induced by phenobarbital].
Complex regional pain syndrome type I (CRPS-I) requires the presence of regional pain and sensory changes associated with findings such as abnormal skin color, temperature change, sudomotor activity, or edema, following a noxious event. Complex regional pain syndrome type I induced by phenobarbital (PB) is not well known, although several reports have strengthened the association between PB and CRPS-I. I reviewed the charts of 99 patients treated with PB to assess the incidence, clinical characteristics, investigations, dosage and plasma concentration of PB, and risk factors in the development of CRPS-I. Six patients developed CRPS-I. Pain was severe and allodynia, swelling, discoloration, sweating were present in all patients. This syndrome manifested bilaterally in some patients. Affected patients included 5 men and 1 woman between the ages of 52 and 78 (average 64.2 years). A radiograph showed demineralization in one patient. Thermography showed temperature differences between affected and unaffected limbs, although in a few patients the differences were little because of bilateral affected limbs. 99Technetium methlyene diphosphonate bone scan showed increased periarticular changes in most of the patients. The patients developed CRPS-I at 9.7 weeks (average) after PB was begun. The average time was 7.5 months between CPRS-I and PB reduction. Neither sympathetic ganglion blockade nor physical therapy was effective. Treatment of CRPS-I consists of PB reduction and prednisone and/or Neurotropin. In all patients clinical symptoms and signs such as pain and edema, and range of motion of their shoulders were improved after PB discontinuation. One patient was followed longitudinally, documenting improvement following discontinuation, reexacerbation with PB rechallenge, and remission once more when PB were discontinued. The higher incidence should depend on the coexistence of separate risk factors such as age and PB dosage. Recognition of CRPS-I induced PB, early diagnosis, and withdrawal of PB are important for symptomatic relief and improvement of QOL.
Aged↗
Intraoperative power Doppler ultrasonography with a contrast-enhancing agent for intracranial tumors.
OBJECT: The goal of this study was to evaluate intraoperative power Doppler ultrasonography when used with a contrast-enhancing agent for operations on intracranial tumors. METHODS: Forty intracranial tumors were examined using power Doppler ultrasonography with a galactose microparticle-based ultrasonographic contrast-enhancing agent during operations on the brain. The tumors included 37 intracranial neoplasms (14 gliomas, six meningiomas, three hemangioblastomas, two malignant lymphomas, three other primary neoplasms, nine metastatic tumors, and three nonneoplastic lesions). All patients also underwent computerized tomography and magnetic resonance imaging, and all but three of the patients underwent digital subtraction (DS) angiography. Before injection of the ultrasonographic contrast agent, intra- and peritumoral power Doppler flow signals were detected in 32 of the intracranial tumors. After the injection, the signals were enhanced in blood vessels around the tumors and in the tumor parenchyma in 36 tumors. The duration of contrast enhancement continued for 70 to 365 seconds (mean 251.8 +/- 69 seconds) after the injection. Among the tumors, hemangioblastomas displayed particularly strong contrast enhancement. In these intracranial tumors, the echo signals obtained using contrast-enhanced power Doppler ultrasonography correlated with DS angiographic staining. Power Doppler ultrasonograms with the appropriate contrast agent provided better data on the precise real-time position of the tumors and their relationship to adjacent vessels than ultrasonograms obtained before the injection of the contrast agent. CONCLUSIONS: Intraoperative power Doppler ultrasonography performed using a contrast-enhancing agent can facilitate intraoperative real-time navigation and assessment of the intratumoral vasculature and peritumoral vessels, particularly for tumors having abundant vessels such as hemangioblastomas.
Adolescent↗
[Rosai-Dorfman disease accompanying hypertrophic cranial pachymeningitis with an early symptom of right peripheral facial palsy].
We experienced a rare case of sinus histiocytosis with massive lymphoadenopathy (Rosai-Dorfman disease) accompanying hypertrophic cranial pachymeningitis. The patient is a 64-year-old woman with an early symptom of rt. peripheral facial palsy. She had a 4-month history of headache with a 5-week history of numbness in the rt. supraorbital nerve area, and lost her weight by 10 kg in 2 months. She developed rt. trochlea nerve palsy and numbness in the lt. mandibular nerve area. Laboratory findings showed that ALP, LDH and CRP were higher than normal. Of CT, MRI and MRA, the images of her head were normal. However, the Gd-enhanced MRI only showed a diffuse pachymeningeal enhancement. After about 3 months from the onset of rt. peripheral facial palsy, she died of DIC of unknown etiology. As a result of examinations in anatomical pathology, she was diagnosed as having sinus histiocytosis with massive lymphoadenopathy (Rosai-Dorfman disease). There were a large number of histiocytes on the pachymeninx. These findings suggest that hypertrophic cranial pachymeningitis caused multiple cranial neuropathy. We emphasize that use of Gd-enhanced MRI in the early stage is important for diagnosis.
Facial Paralysis↗