Songkram Chotik-AnuchitSasitorn SirithoSiri on TritrakarnOrasa ChawalpritNaraporn PrayoonwiwatMahidol University2018-05-032018-05-032011-01-01Journal of the Medical Association of Thailand. Vol.94, No.1 (2011), 27-3501252208012522082-s2.0-79251574327https://repository.li.mahidol.ac.th/handle/20.500.14594/12732Objective: To study the demographic data of optico-spinal inflammatory demyelinating disease (OS-IDD) patients at Siriraj Hospital between January 1997 and October 2006 Design: Retrospective study of OS-IDD patients. Results: There were 84 OS-IDD patients. Cerebrospinal fluid analysis revealed higher white blood cell count and neutrophilia in neuromyelitis optica (NMO) patients than those of multiple sclerosis (MS) patients. NMO had an average length of 4.1 segments of the cervical and 6.5 segments of thoracic cord involvement. Conclusion: Among Thai OS-IDD patients, on the basis of clinical features, NMO was hardly differentiated from MS.Mahidol UniversityMedicineArticleSCOPUS