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Query: UMLS:C0019270 (hernia)
 15,856 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Monoradicular compression was achieved with an original technique. As a compressive factor the authors made use of a device that can be easily removed by a simple monoeuver. From the clinical and functional aspects the nervous suffering induced in 11 dogs was similar to that encountered in men with intervertebral disc hernia. From the histological viewpoint, irritative phenomena were noted over the entire area of distribution of the compressed spinal nerve. Degenerative aspects were also observed in the thick myelin fibres. Similar lesions developed on the opposite side, in the neighbouring medullary segments. Ten months after the suppression of the compression minor degenerative lesions were noted in the nervous elements on both sides, as well as a large number of regenerated fibres suggesting an aspect of neurinoma. The electromyographic aspects were in support of the histologic data. These results can be extrapolated in the human pathology.
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PMID:[Experimental model for reproduction of monoradicular compression by disk hernias]. 644 26

Benign neoplasms originating from the neuronal sheath are usually found along the distribution of the cranial nerves and in the flexor surfaces of the upper and lower extremities. We herein present a case of a 65-year-old man with a schwannoma located in the inguinal canal, which presented as an irreducible hernia. This is the first reported case in the English literature of a schwannoma with such a presentation.
Hernia 2004 Feb
PMID:Schwannoma in the inguinal canal masquerading an inguinal hernia. 1450 34

In this report, we describe a small schwannoma of the dural sleeve and mention that it is often difficult to differentiate this tumor from lumbar disc herniation, especially a sequestered hernia, or a discal cyst. Gadolinium-enhanced MR images were a useful preoperative examination modality for differentiating this lesion from other diseases. Microscopically, the intradural tumor was successfully removed. The dura mater of the S1 nerve root was opened microsurgically, allowing the nerve fibers involved in the tumor to be identified. The involved fibers were cut around the tumor, and the lesion was resected while the intact nerve fibers were preserved. Based on histological examination of the resected specimen, the tumor was diagnosed as a schwannoma with multilocular cystic degeneration. Microsurgery allowed the tumor to be removed with minimal impairment from cutting of nerve fibers in the nerve root.
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PMID:A schwannoma of the S1 dural sleeve was resected while the intact nerve fibers were preserved using a microscope. Report of a case with early MRI findings. 1767 1

Herniation of the lumbar disc is a common cause of low back pain. Conservative management with physiotherapy, such as lumbar spine traction, is usually effective. Although a schwannoma of the lumbar spine is relatively uncommon, the clinical manifestations are similar to those of lumbar disc herniation, making the diagnosis difficult. This case report describes a 51-year-old male who had suffered from low back pain for 3 years and who was diagnosed with L2/L3 lumbar disc herniation. The low back pain was well-controlled by conservative treatment and the symptoms improved progressively. Two months prior to our evaluation, however, the symptoms worsened acutely, and were accompanied by the onset of symptoms of cauda equina syndrome. A small tumor at the site of the L2/L3 disc herniation, observed incidentally during magnetic resonance imaging, was responsible for the symptoms of spinal stenosis at the lumbar region. The patient underwent laminectomy, tumor resection, and discectomy with near-complete resolution of symptoms. In patients with lumbar disc herniation that improves with conservative treatment, the recurrence of symptoms should prompt a thorough review of the medical history, physical examination, and imaging studies to establish the diagnosis and prevent delay in treatment.
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PMID:Exacerbation of symptoms of lumbar disc herniation complicated by a schwannoma: a case report. 1776 18

Incidental or intentional durotomy causing cerebrospinal fluid (CSF) leakage, leading to the formation of a pseudomeningocele is a known complication in spinal surgery. Herniation of nerve roots into such a pseudomeningocele is very rare, but can occur up to years after initial durotomy and has been described to cause permanent neurologic deficit. However, cauda equina fiber herniation and entrapment into a pseudomeningocele has not been reported before. Here, we present a case of symptomatic transdural cauda equina herniation and incarceration into a pseudomeningocele, 3 months after extirpation of a lumbar Schwannoma. A 59-year-old man, who previously underwent intradural Schwannoma extirpation presented 3 months after surgery with back pain, sciatica and loss of bladder filling sensation caused by cauda equina fiber entrapment into a defect in the wall of a pseudomeningocele, diagnosed with magnetic resonance imaging. On re-operation, the pseudomeningocele was resected and the herniated and entrapped cauda fibers were released and replaced intradurally. The dura defect was closed and the patient recovered completely. In conclusion, CSF leakage can cause neurological deficit up to years after durotomy by transdural nerve root herniation and subsequent entrapment. Clinicians should be aware of the possibility of this potentially devastating complication. The present case also underlines the importance of meticulous dura closure in spinal surgery.
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PMID:Cauda equina entrapment in a pseudomeningocele after lumbar schwannoma extirpation. 1992 48

Schwannoma is a benign nerve sheath tumor composed of Schwann cells. A solitary schwannoma in the thorax is not rare, but a patient with Neurofibromatosis type 2 (NF2) and multiple thoracic schwannomas is extremely rare. We report the case of a 27-year-old woman with NF2 and two large schwannomas in her mediastinum and chest wall. We performed thoracic surgery on the patient, but she developed a cerebral hernia immediately after the operation. We report this case in order to analyze the relationship between the operation and cerebral hernia and find a way to prevent this consequence in the future. We conclude that a cranial MRI must be performed for patients with multiple thoracic schwannomas before the surgery. If there is a tumor inside the cranium, the disease in the brain must be treated first to prevent the occurrence of cerebral hernia or hemorrhage.
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PMID:Cerebral hernia caused by a thoracic surgery for multiple schwannomas in a patient with Neurofibromatosis type 2. 2354 12