Fig. 4.
Periependymal linear enhancement in two different patients with seropositive NMO during first acute TM attack. (A) Axial FLAIR and (B) T1-weighted contrast-enhanced images of a 21-year-old female show periependymal linear hyperintensity and linear enhancement along the frontal horns of lateral ventricles. (C) Axial FLAIR and (D) T1-weighted contrast-enhanced images of a 35-year-old female demonstrate periependymal linear hyperintensity and linear enhancement around the cerebral aqueduct (arrows).