Central nervous system (CNS) immune reconstitution white matter lesions and
brain abscesses by Magnetic Resonance Imaging (MRI) (case report 1). a-c. Brain lesions at the onset of focal neurological symptoms. a. Axial FLAIR brain sequence showing non specific asymmetric bilateral hyperintensity in the subcortical region, expression of immune recconstitution inflammatory reaction. b. Axial FLAIR sequence showing abscessual lesion, surrounded by oedema, in the right temporal region. c. Gadolinium (Gd)-T1 sequence shows the presence of nodular enhancement of the right temporal lesion. d-f. Evolution of brain lesions 1 month after onset of symptoms. d. Axial FLAIR sequence shows the persistence of the non specific white matter hyperintensity; e. Axial FLAIR sequence shows an increase of lesion size and oedema of the right temporal lesion; f. Gd-T1 sequence shows the evolution of contrast enhancement, now presenting as ring enhancement, typical of an abscessual lesion.