Wang J, Gao Y, Xiao L, Lin Y, Huang L, Chen J, et al
These commenters recommended that CMS consider one modification to the policyto create a process to request an extension beyond 180 days for complex investigations
Mean 3 to 4 years Gait abnormality Clinical Extrapyramidal: Dystonia, Dysarthria, Rigidity Corticospinal: Spasticity, Hyperreflexia, Extensor toe signs Ocular Pigmentary retinopathy: Two thirds of childhood cases Optic atrophy Progression Rapid Lose ability to ambulate independently within 10 to 15 years of onset Intermittent periods of rapid, often precipitous, clinical deterioration Variant subgroup Hypoprebetalipoproteinemia, Acanthocytosis, Retinopathy & Pallidal degeneration (HARP) Atypical PKAN Onset Mean 13 to 14 years Neurobehavioral disorders Clinical Behavioral Mood: Depression, Emotional lability Personality changes Cognitive decline Speech disorders Palilalia & Tachylalia Hypophonia Difficulty initiating speech Extrapyramidal Dystonia Rigidity Corticospinal: Spasticity Progression Slower than typical form Loss of independent ambulation after 15 to 40 years Intermittent periods of rapid clinical deterioration MRI: Globus pallidus on T2-weighted images Central region of hyperintensity Primary tissue insult Produces edema Surrounding hypointensity Region high in iron May be 2 process "Eye-of-the-tiger" sign Pathology Deposition of iron Especially globus pallidus & retina Other iron deposition disorders Axonal spheroids: In regions of iron deposition Other laboratory features Acanthocytosis Hypoprebetalipoproteinemia Serum CK: May be high or normal Muscle Scattered fiber necrosis Macrophage activation Mitochondrial: Reduced COX staining Mitochondrial Membrane Protein Associated Neurodegeneration (MPAN
DsbC activation by the N-terminal domain of DsbD
