summary Friedreich's Ataxia is an inherited disorder that leads to spinocerebellar degeneration due to an autosomal recessive mutation in the frataxin gene. The condition presents with ataxia, cardiomyopathy, motor weakness, cavovarus foot deformity, and scoliosis usually from age 7 to 25 year. Diagnosis is made with genetic testing to assess for the absence of the frataxin gene. Treatment is initially nonoperative. Corrective surgery for symptomatic cavovarus foot deformity and progressive scoliosis may be indicated over time. Epidemiology Incidence 1 in 50,000 births Demographics onset usually between 7 and 25 years age of onset related to number of GAA repeats Etiology Genetics autosomal recessive repeat mutation leads to lack of frataxin gene frataxin is a mitochondrial protein involved in iron metabolism and oxidative stress mutation is GAA repeat at 9q13 Associated conditions pes cavovarus foot scoliosis predictors of progression login to view 2 more bullets cardiomyopathy cardiology evaluation before surgery antioxidants (Coenzyme Q) have been shown to decrease rate of cardiac deterioration but have no effect on ataxia Presentation Symptoms ataxia staggering wide based gait (spinocerebellar) Physical exam classic triad ataxia areflexia positive plantar response weakness nystagmus cavovarus foot very high arch rigid deformity associated claw toes scoliosis Imaging Radiographs recommended views standing scoliosis series AP and lateral of foot if pes cavovarus present Studies EMG shows defects in motor and sensory with an increase in polyphasic potentials nerve conduction velocities are decreased in upper extremities Treatment Cavovarus foot nonoperative observation login to view 3 more bullets operative plantar release, transfers, +/- metatarsal and calcaneal osteotomy login to view 2 more bullets triple arthrodesis login to view 2 more bullets Scoliosis nonoperative observation login to view 2 more bullets operative PSF and instrumentation login to view 6 more bullets Prognosis Usually wheelchair bound by age 30 Usually die by age 50 from cardiomyopathy