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  • Title: Spinal cord tumor versus transverse myelitis.
    Author: Habek M, Adamec I, Brinar VV.
    Journal: Spine J; 2011 Dec; 11(12):1143-5. PubMed ID: 22082692.
    Abstract:
    BACKGROUND CONTEXT: Longitudinally extensive transverse myelitis (LETM) is one of the defining features of neuromyelitis optica (NMO). Despite the well-established criteria, clinical and paraclinical features, the disease is often misdiagnosed and erroneously treated. PURPOSE: We report on a case of LETM in a patient with spatially limited NMO spectrum disorder that was misdiagnosed as spinal cord tumor and underwent spinal cord biopsy. STUDY DESIGN: A 43-year-old female patient is described. METHODS: The patient developed spastic tetraparesis over 1 week. Spinal cord magnetic resonance imaging (MRI) revealed LETM, and she was treated with steroids and recovered. Nine months later, her condition worsened and repeat spinal cord MRI was interpreted as a large intramedullary tumor in the cervical region with irregular postcontrast enhancement. Biopsy revealed demyelination. Cerebrospinal fluid (CSF) analysis revealed positive oligoclonal IgG bands, and serum was positive for NMO-IgG antibody. RESULTS: The patient was diagnosed with spatially limited NMO spectrum disorder, treated with plasma exchange, high-dose corticosteroids, and cyclophosphamide, and with good recovery. CONCLUSIONS: The factors favoring inflammatory LETM are acute or subacute onset of clinical symptoms, positive oligoclonal bands in the CSF, positive NMO-IgG or other antibodies, and brain MRI showing demyelinating lesions. Postcontrast axial MRI sequences of the spinal cord can also be helpful. In doubtful situations, a trial of therapy and follow-up MRI a month later might be a more prudent approach if the patient is not rapidly deteriorating.
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