Multiple Sclerosis Patients with Markedly Low Intrathecal Antibody Response in Sri Lanka

Table 4

Magnetic resonance imaging characteristics.

Number of MRIs analyzed (%)
Brain	143 (207)
Spinal cord (full)	27 (39)
Cervical cord only	03 (4)
Types of MRI lesions (%)
Hyperintense lesions in T2W and FLAIR	69 (100)
Hypointense lesions in T1W	69 (100)
Number of brain lesions: average (range)	6 (3–12)
Locations of lesions (%)
Periventricular	55 (80)
Juxtacortical	48 (69)
Infratentorial	51 (74)
Spinal cord	11 (16)
Cervical cord	12 (17)
Corpus callosum	34 (49)
Optic nerve	18 (26)

MRI: magnetic resonance imaging; T1W: T1 weighted pulse sequence; T2W: T2 weighted pulse sequence; (a) lesions of the spinal cord +/− involvement of cervical cord; (b) lesions confined to cervical cord. with T2W hyperintense spinal cord lesions which are centrally located and extend more than 3 spinal segments were excluded.