1/118. Chronic steadily progressive central and peripheral predominantly motor demyelination, involving the cranial nerves, responsive to immunoglobulins.The association of central and peripheral demyelination was reported previously. Most of the cases refer to central chronic relapsing demyelination with clinical criteria for multiple sclerosis associated with later signs of peripheral nerve involvement. Other authors, described central lesions in patients with chronic inflammatory demyelinating polyneuropathy and in guillain-barre syndrome, as a seldom occurrence. We report a patient in which a chronic steadily progressive central and peripheral predominantly motor nervous system demyelination, involving the cranial nerves, was identified. The patient improved after intravenous immunoglobulin suggesting an immune-mediated mechanism. To our knowledge this presentation was not described before.- - - - - - - - - - ranking = 1keywords = nervous system (Clic here for more details about this article) |
2/118. optic atrophy and chronic acquired polyneuropathy.Chronic inflammatory demyelinating polyneuropathy (CIDP) is a chronic, multifocal disorder usually defined as limited to the peripheral nervous system. Multifocal motor neuropathy, an acquired demyelinating neuropathy with conduction block affecting motor neurons only, may be a pathogenically distinct syndrome or a predominantly motor variant of chronic inflammatory demyelinating polyneuropathy. central nervous system demyelination including optic neuropathy has been reported uncommonly previously in these entities. We report two cases and review the literature on the possible association of optic neuropathy and chronic acquired polyneuropathy.- - - - - - - - - - ranking = 2keywords = nervous system (Clic here for more details about this article) |
3/118. Leukoencephalopathy in childhood acute lymphoblastic leukemia with t(1;19).To clarify the incidence of leukoencephalopathy in patients with t(1;19) and their clinical characteristics, we studied 239 acute lymphoblastic leukemia (ALL) cases. The 1;19 translocation was found in 20 (8.5%) of the 239 children with ALL. Leukoencephalopathy occurred in 2 (10%) patients with t(1;19) during the early first remission and in one case with t(1;19) at the time of central nervous system (CNS) relapse. Leukoencephalopathy was not found during the early first remission in patients lacking t(1;19), but did develop in 4 patients lacking t(1;19) at the time of CNS relapse. There were no differences in age, sex, leukocyte count, platelet count or serum lactate dehydrogenase level between t(1;19) patients with and without leukoencephalopathy. Our results suggest the incidence of leukoencephalopathy in patients with t(1;19) during the early first remission to be 10%, but we can not predict which patients will develop leukoencephalopathy.- - - - - - - - - - ranking = 1keywords = nervous system (Clic here for more details about this article) |
4/118. Demyelination of retinal myelinated nerve fibers in Behcet's disease.A 39 year-old Behcet's patient had demyelination of retinal myelinated nerve fibers after recurrent papillitis and vitritis. Oral prednisolone, cyclosporine, and later periocular corticosteroids and oral colchicine were used but demyelination continued over a 5 year-period. A pseudobulbar palsy with urinary incontinence and pyramidal tract signs developed and azathioprine and corticosteroids were used. Demyelination of retinal nerve fibers stopped and while treatment was underway, the central nervous system (CNS) signs were stable. While the ocular pathology of Behcet's can mirror the CNS signs, indeed optic nerve ischemic demyelination may signal the potential for CNS involvement; azathioprine with prednisone may be more effective in the long-term for optic nerve and CNS involvement than cyclosporine with prednisone.- - - - - - - - - - ranking = 1keywords = nervous system (Clic here for more details about this article) |
5/118. Demyelination in primate autoimmune encephalomyelitis and acute multiple sclerosis lesions: a case for antigen-specific antibody mediation.Neuropathological and ultrastructural features of central nervous system demyelination were compared in marmoset experimental autoimmune encephalomyelitis (EAE) induced with myelin/oligodendrocyte glycoprotein (MOG), and in 3 cases of multiple sclerosis (MS) displaying recent lesions. At the edges of EAE and MS lesions, a zone of myelin vacuolation was common, whereas in the lesion proper, myelin sheaths were consistently transformed into vesiculated membranous networks. These networks became dissociated from axons by cell processes from macrophages. Oligodendrocytes were remarkably spared and evidence of myelin repair was present but not prominent. Axonal pathology was more common in the MS material than in marmoset EAE. Immunocytochemistry, using gold-labeled encephalitogenic peptides of MOG and silver enhancement to detect MOG autoantibodies, revealed the presence of MOG-specific autoantibodies over vesiculated myelin networks. gold-labeled antibody to IgG also gave a positive reaction. gold-labeled peptide of myelin basic protein did not react with MOG/EAE tissue, but the same conjugate gave positive staining in MS (and in marmoset EAE induced by whole white matter), perhaps indicating broader spectrum immunoreactivity or sensitization to myelin antigens. Thus, vesicular disruption of myelin was a constant feature in these evolving, highly active lesions in primate EAE and MS and appeared causally related to the deposition of antigen-specific autoantibodies.- - - - - - - - - - ranking = 1keywords = nervous system (Clic here for more details about this article) |
6/118. magnetic resonance imaging in five patients with a tumefactive demyelinating lesion in the central nervous system.Five patients with a tumefactive lesion were clinically followed from 1992 to 1993. Four patients were female; age ranged from 32 to 57 years, the duration of symptoms varied from 3 days to 3 years. Neurological examination disclosed dementia in two patients, aphasia in three, hemiparesis in four, hemihypoaesthesia in three, optical neuritis in two, tetraparesis with sensitive level and neurogenic bladder in one. MRI disclosed lesions with a hypersignal on images assessed at T2 and hyposignal at T1, and gadolinium heterogeneous enhancement; these lesions were located in the: a) temporooccipital region bilaterally and brain stem, b) frontoparietal white matter, c) basal ganglia, bilateral white matter and brain stem, d) left parietal region, e) cervical spinal cord, with enlargement of this region. Cerebral biopsy was performed in three patients; acute and subacute demyelinating disease was diagnosed by histological examination. Two patients had an evolutive diagnosis; exclusion of other pathologies and clinical and radiological improvement after corticotherapy, pointed to an inflammatory disease.- - - - - - - - - - ranking = 4keywords = nervous system (Clic here for more details about this article) |
7/118. poland-Moebius syndrome: a case report.BACKGROUND: The primary site of pathology in Moebius syndrome is still unknown, although several studies have variably localized the lesion in the extraocular muscles, cranial nerves, or central nervous system. CASE: A 24-year-old man with poland-Moebius syndrome and acquired progressive bilateral paralytic lower eyelid ectropion is described. OBSERVATIONS: In this patient, magnetic resonance imaging studies revealed a barely detectable pontine hypoplasia and normal recti muscles. Nerve conduction studies of the facial nerves showed a severe demyelinating or dysmyelinating type of neuropathy. Bilateral lower eyelid ectropium of the patient was successfully corrected by canthal tightening procedures. CONCLUSION: Contrary to many reported cases, this patient serves as a rare example of a progressive type of poland-Moebius syndrome presumably resulting from a combination of a brainstem abnormality and a peripheral neural degenerative process.- - - - - - - - - - ranking = 1keywords = nervous system (Clic here for more details about this article) |
8/118. PMP22 related congenital hypomyelination neuropathy.The peripheral myelin protein 22 (PMP22) is a tetraspan membrane protein which is localised in the compact myelin of the peripheral nerves. In fibroblasts, where it was originally identified as growth arrest related factor 3 (Gas3), PMP22 has been shown to modulate cell proliferation; in the peripheral nervous system its roles are still debated. The duplication of PMP22 is the most common cause of the demyelinating form of the autosomal dominant Charcot-Marie-tooth neuropathy (CMT1A); rarer missense mutations of PMP22 also cause CMT1A or severe dehypomyelinating neuropathies of infancy grouped under the heading of Dejerine-Sottas syndrome (DSS). Here, a sporadic patient affected with DSS is described; nerve biopsy disclosed a picture of hypomyelination/amyelination with basal laminae onion bulbs and no florid demyelination and it was consistent with congenital hypomyelination neuropathy (CHN); molecular analysis disclosed a novel point mutation of PMP22 that causes a non-conservative arginine for cysteine substitution at codon 109, in the third transmembrane domain. CHN is the rarest and severest form of DSS and it is thought to reflect dysmyelination rather than demyelination. The reported case suggests that missense point mutations may alter a putative role of PMP22 in modulating Schwann cell growth and differentiation.- - - - - - - - - - ranking = 1keywords = nervous system (Clic here for more details about this article) |
9/118. diagnosis of a multifocal B cell lymphoma with preceding demyelinating central nervous system lesions by single voxel proton MR spectroscopy.Single voxel proton magnetic resonance spectroscopy (MRS) provides a rapid non-invasive fingerprint of tissue chemistry. A case history is presented in which a B cell lymphoma with antecedent demyelinating lesions of the CNS was suspected by MRS and confirmed by neuropathological examination and immunoglobulin gene rearrangement.- - - - - - - - - - ranking = 4keywords = nervous system (Clic here for more details about this article) |
10/118. Demyelinating disorder of the central nervous system occurring in black South Africans.OBJECTIVES: To investigate the nature and cause in eight black South African patients of a recurrent (multiphasic), remitting, and relapsing demyelinating disease of the CNS. methods: The clinical and laboratory investigations and radiological manifestations of these patients were documented. RESULTS: Each patient had two or more acute attacks of demyelinating disease affecting the CNS. The clinical presentations of the patients were predominantly those of multiphasic neuromyelitis optica (NMO). Brain MRI in these patients showed features consistent with those described for acute disseminated encephalomyelitis (ADEM), as well as lesions that are described in multiple sclerosis. There was involvement of the corpus callosum in addition to typical ADEM lesions. Laboratory investigations excluded all other known causes of multiphasic CNS demyelination. Oligoclonal antibodies were not detected in these patients at any time. The patients were all from a population with a low risk for MS (black South Africans). CONCLUSION: The patients described here represent a new phenotypic expression of a recurrent (multiphasic), steroid sensitive, inflammatory demyelinating disorder of the CNS occurring in black South Africans. The disorder is either a distinct inflammatory demyelinating disorder of the CNS of as yet unknown aetiology, or a varied form of MS (ADEM/NMO) occurring in a population with a low risk (where the genetic trait and environmental risk factors for MS do not exist) for MS.- - - - - - - - - - ranking = 4keywords = nervous system (Clic here for more details about this article) |
| | Next -> |