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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Other Disorders Of The Central Nervous System 340-349 > ICD-9-CM Diagnosis 341 Other demyelinating diseases of central nervous system 341 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 341.0 Neuromyelitis optica A syndrome characterized by acute OPTIC NEURITIS in combination with acute MYELITIS, TRANSVERSE. Demyelinating and/or necrotizing lesions form in one or both optic nerves and in the spinal cord. The onset of optic neuritis and myelitis may be simultaneous or separated by several months. (J Neurol Neurosurg Psychiatry 1996 Apr;60(4):382-387) 341.0 is a specific code that can be used to specify a diagnosis 341.0 contains 7 index entries ICD-9-CM Diagnosis 341.1 Schilder's disease A rare central nervous system demyelinating condition affecting children and young adults. Pathologic findings include a large, sharply defined, asymmetric focus of myelin destruction that may involve an entire lobe or cerebral hemisphere. The clinical course tends to be progressive and includes dementia, cortical blindness, cortical deafness, spastic hemiplegia, and pseudobulbar palsy. Concentric sclerosis of Balo is differentiated from diffuse cerebral sclerosis of Schilder by the pathologic finding of alternating bands of destruction and preservation of myelin in concentric rings. Alpers' Syndrome refers to a heterogeneous group of diseases that feature progressive cerebral deterioration and liver disease. (From Adams et al., Principles of Neurology, 6th ed, p914; Dev Neurosci 1991;13(4-5):267-73) 341.1 is a specific code that can be used to specify a diagnosis 341.1 contains 13 index entries ICD-9-CM Diagnosis 341.2 Acute (transverse) myelitis 341.2 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 341.20 Acute (transverse) myelitis NOS 341.20 is a specific code that can be used to specify a diagnosis 341.20 contains 2 index entries ICD-9-CM Diagnosis 341.21 Acute (transverse) myelitis in conditions classified elsewhere 341.21 is a specific code that can be used to specify a diagnosis 341.21 contains 2 index entries ICD-9-CM Diagnosis 341.22 Idiopathic transverse myelitis 341.22 is a specific code that can be used to specify a diagnosis 341.22 contains 3 index entries ICD-9-CM Diagnosis 341.8 Other demyelinating diseases of central nervous system A demyelinating condition affecting the PONS and characterized clinically by an acute progressive QUADRIPLEGIA; DYSARTHRIA; DYSPHAGIA; and alterations of consciousness. Pathologic features include prominent demyelination in the central PONS with sparing of axons and neurons. This condition is usually associated with systemic disorders such as HYPONATREMIA; chronic ALCOHOLISM; LIVER FAILURE; severe BURNS; malignant NEOPLASMS; hemorrhagic PANCREATITIS; HEMODIALYSIS; and SEPSIS. The rapid medical correction of hyponatremia has been cited as a cause of this condition. (From Adams et al., Principles of Neurology, 6th ed, pp1125-6) 341.8 is a specific code that can be used to specify a diagnosis 341.8 contains 11 index entries ICD-9-CM Diagnosis 341.9 Demyelinating disease of central nervous system unspecified 341.9 is a specific code that can be used to specify a diagnosis 341.9 contains 5 index entries