The mother of a 3-year old male child was concerned because she noticed that her son has been falling frequently and seems to be very clumsy. She also noticed that he is very slow in running and climbing and walks on his toes.
She is most concerned because her uncle has been diagnosed with muscular dystrophy (MD) and worries that she may carry the gene.
The physician ordered an electromyography (EMG) and muscle biopsy to aid in the diagnosis.
Based on the symptoms and signs that the child exhibited what may be the diagnosis?