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DefinitionDisc derangement at C1–C2 occurs when fibers of the disc’s outer ring (annulus fibrosus) tear or the inner gel (nucleus pulposus) pushes outward. This can happen...
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DefinitionC1–C2 facet joint arthritis, also known as atlantoaxial facet arthropathy, is a degenerative condition affecting the small synovial joints that connect the first cervical vertebra (atlas)...
DefinitionC1–C2 facet joint arthropathy is a form of osteoarthritis affecting the small, paired synovial joints between the first (atlas) and second (axis) cervical vertebrae. Over time,...
DefinitionC1–C2 facet joint osteoarthritis is a degenerative condition affecting the uppermost joints of the spine, located between the first cervical vertebra (atlas) and the second cervical...
DefinitionInternal disc disruption (IDD) at the C1–C2 level refers to microscopic tears and degeneration within the nucleus pulposus and inner annulus fibrosus of the atlantoaxial disc....
DefinitionNucleus pulposus dehydration refers to the loss of water content and glycosaminoglycan matrix within the gelatinous core of an intervertebral disc. In the atlas–axis complex (C1–C2),...
DefinitionA C1–C2 spine sprain, often called an atlantoaxial ligament sprain, occurs when one or more ligaments connecting the first cervical vertebra (atlas) and the second cervical...
DefinitionC11orf73-related autosomal recessive hypomyelinating leukodystrophy is a rare brain white-matter disease that starts in infancy. In this condition, the fatty insulation (myelin) around nerve fibers in...
DefinitionC11ORF73-related autosomal recessive hypomyelinating leukoencephalopathy is a rare genetic brain white-matter disease. “Hypomyelinating” means the brain does not lay down normal myelin (the fatty insulation around...
DefinitionC12orf65 combined oxidative phosphorylation deficiency is a very rare genetic disease that affects how the “power stations” of the cell (mitochondria) make energy. In this condition,...
DefinitionC1q deficiency is a very rare inherited immune problem where the body makes too little—or none—of a protein called C1q. C1q is the “starter” of the...
