Parents of a 3-year-old boy noticed that their son was walking "on his toes", had a waddling gait, fell frequently, had difficulty getting up again, and was not able to run because of the difficulty in lifting his knees. At age five, there was progressive muscular weakness and atrophy. Weakness of the trunk muscles led to increased lordosis and a protuberant abdomen. He was able to speak clearly and the muscles of his face functioned normally. At age 9, he was confined to a wheelchair. Circle the disorder you believe is the cause of the described symptoms. Explain your choice, including why the other disorder were eliminated.

a. Muscular dystrophy

b. Multiple sclerosis

c. Myasthenia gravis

d. Polio

Progressive muscular dystrophy, which shows the patient by the symptoms that were manifested from three years of age and who started with walking on his toes and the difficulty in raising the legs accompanied by progressive weakness confirm this diagnosis worsening his clinical manifestation at nine years of age, where there is a marked skeletal muscle deformity that makes the use of a wheelchair necessary. we can discard miestemia gravis and multiple scoliosis because they are not pathologies of this age group, polio in turn is a contagious infectious disease that is eradicated in much of the world, mostly in developed countries thanks to the vaccine.