Due to advances in MRI, this neurological disorder has been characterized more successfully in more recent years. MRI can aid in the detection of injured brain tissue; however, the severity and extent of the damage demonstrated by imaging does not always reflect patient clinical status.<unk>  encompasses the degeneration of white matter tracts devoted to higher cerebral function; however, white matter can appear normal until the disease has progressed more intensely.<unk> -related damage to central nervous system (CNS) white matter, typically of the periventricular nucleus, and other structures in the brain is often bilateral and symmetric. Heroin-induced leukoencephalopathy often involves damage to cerebellar white matter, posterior cerebral white matter, posterior limb of internal capsule, and cerebellar peduncles. The occipital lobe is typically most affected though the frontal, parietal, and temporal lobes have shown involvement as well. Other<unk> s have been shown to extend damage to other structures of the brain, including the hippocampus, dorsal medulla, and brainstem.
Toxic leukoencephalopathy
Powassan encephalitis
Progressive multifocal leukoencephalopathy
Viral encephalitis
Herpesviral encephalitis
Autoimmune encephalitis
Tuberculous meningitis
Polioencephalitis