Other noninfectious inflammatory disorders.

Area of Science:

• Neurology
• Neuroimmunology
• Neuroradiology

Background:

• Idiopathic inflammatory-demyelinating diseases (IIDDs) are a diverse group of central nervous system (CNS) disorders.
• These include multiple sclerosis (MS) and distinct entities like acute disseminated encephalomyelitis and neuromyelitis optica spectrum disorders.
• Primary angiitis of the CNS (PACNS) and systemic inflammatory conditions affecting the CNS are also considered.

Purpose of the Study:

• To review the spectrum of CNS inflammatory and demyelinating disorders.
• To highlight diagnostic challenges, particularly differentiating PACNS from reversible cerebral vasoconstriction syndrome (RCVS).
• To emphasize the role of neuroimaging in diagnosis.

Main Methods:

• Review of literature on IIDDs, MS variants, and other CNS inflammatory conditions.
• Discussion of diagnostic criteria and differential diagnoses.
• Emphasis on the utility of magnetic resonance imaging (MRI) of the brain and spine.

Main Results:

• IIDDs present with varied clinical courses and lesion distributions.
• PACNS is a rare CNS vasculitis that can be misdiagnosed as RCVS.
• MRI, clinical, and laboratory findings are crucial for accurate diagnosis.

Conclusions:

• Accurate diagnosis of IIDDs requires careful consideration of clinical presentation, disease course, and imaging findings.
• Distinguishing between different IIDDs and mimics like RCVS is essential for appropriate management.
• MRI is a key diagnostic tool for evaluating these complex neurological disorders.