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An 11-year-old boy is evaluated after reporting progressive difficulty walking. After extensive workup, he is diagnosed with Becker muscular dystrophy. Which of the following best describes the characteristic findings associated with this diagnosis?
Pseudohypertrophy of the calves, markedly increased creatine kinase levels, and abnormal dystrophin
Proximal muscle weakness occuring early in childhood, absent deep tendon reflexes and fasciculations
Mildly elevated creatine kinase levels, severe limb contractures present at an early age
Acute onset of weakness, hypotonia, and arefelxia resulting from postinfectious demyelination of the peripheral nerves
X-linked transmission, absence of dystrophin, and significantly increased creatine kinase levels
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A 9-year-old boy with Duchenne muscular dystrophy has increasing difficulty with ambulation. He denies back pain, difficulty sitting in a chair, or shortness of breath. Annual screening spine radiographs demonstrate a 20 degree thoracolumbar curve. Which of the following statements best describes the appropriate treatment plan for his scoliosis?
Given the poor prognosis, surgical treatment is not appropriate
Posterior spinal fusion should be performed before curve progresses beyond 30 degrees
Posterior spinal fusion should be performed if the curve progresses to greater than 55 degrees
Posterior spinal fusion should be performed if FVC drops below 60%
With appropriate bracing, curve progression and surgical treatment will most likely be unnecessary
What is the inheritance pattern for Duchenne's muscular dystrophy?
HPI - A 2.5 years old male presents with this gait abnormality. He has flexion deformity walking gait in both knees which was first noticed when he started to walk about year ago.
What is the most likely diagnosis?