Neuromyelitis optica is distinguished from multiple sclerosis by the presence of which antibody and typical distribution?

Prepare for the PANCE Neurology Test with comprehensive materials. Use flashcards and multiple-choice questions, each featuring hints and explanations. Boost your confidence and ace your exam!

Multiple Choice

Neuromyelitis optica is distinguished from multiple sclerosis by the presence of which antibody and typical distribution?

The key idea is that neuromyelitis optica (NMO) is defined by autoantibodies against aquaporin-4 and a characteristic distribution of disease: optic neuritis with spinal cord inflammation that extends over long segments. Anti-AQP4 antibodies (NMO-IgG) are highly specific for NMO spectrum disorders, and the spinal cord involvement typically spans three or more vertebral segments, called longitudinally extensive transverse myelitis. This combination—anti-AQP4 positivity plus optic neuritis with long-segment myelitis—distinguishes NMO from multiple sclerosis, where spinal lesions are usually shorter and brain lesions are more common, and anti-AQP4 antibodies are not present. While anti-MOG antibodies can be seen in demyelinating diseases and MS-like syndromes, the classic signature for NMO is anti-AQP4 with optic neuritis and longitudinally extensive myelitis.

The key idea is that neuromyelitis optica (NMO) is defined by autoantibodies against aquaporin-4 and a characteristic distribution of disease: optic neuritis with spinal cord inflammation that extends over long segments. Anti-AQP4 antibodies (NMO-IgG) are highly specific for NMO spectrum disorders, and the spinal cord involvement typically spans three or more vertebral segments, called longitudinally extensive transverse myelitis. This combination—anti-AQP4 positivity plus optic neuritis with long-segment myelitis—distinguishes NMO from multiple sclerosis, where spinal lesions are usually shorter and brain lesions are more common, and anti-AQP4 antibodies are not present. While anti-MOG antibodies can be seen in demyelinating diseases and MS-like syndromes, the classic signature for NMO is anti-AQP4 with optic neuritis and longitudinally extensive myelitis.

More practice questions