TABLE 411-1 -PATHOPHYSIOLOGIC CLASSIFICATION OF SOME COMMON NEUROLOGIC COMPLICATIONS OF LATE HIV-1 INFECTION

UNDERLYING PROCESS	EXAMPLES
Opportunistic infections	Cerebral toxoplasmosis Cryptococcal meningitis Progressive multifocal leukoencephalopathy Cytomegalovirus encephalitis, polyradiculitis
Opportunistic neoplasms	Primary central nervous system lymphoma Metastatic lymphoma
Conditions possibly related to HIV-1 itself	AIDS dementia complex Aseptic meningitis Predominantly sensory polyneuropathy
Metabolic and vascular complications of systemic disease	Hypoxic, sepsis-related encephalopathies Stroke (nonbacterial thrombotic endocarditis, coagulopathies)
Toxic reactions	Dideoxyinosine, dideoxycytidine neuropathies AZT myopathy
Functional (psychiatric) disorders	Anxiety disorders Psychotic depression