At what age is Duchenne Muscular Dystrophy typically diagnosed?

Duchenne Muscular Dystrophy (DMD) is a genetic disorder characterized by progressive muscle degeneration and weakness due to the absence of dystrophin, a protein that helps keep muscle cells intact. The typical onset of symptoms, which may include difficulty walking, frequent falls, and difficulty climbing stairs, usually occurs between the ages of 3 and 5.

During this period, caregivers often notice delays in motor milestones such as running or jumping, as well as signs of muscle weakness. The diagnosis is often confirmed through muscle biopsy, genetic testing, or elevated creatine kinase levels, ideally occurring when the child's symptoms are more pronounced, which aligns with the age range of 3 to 5 years. Early recognition is crucial for management and intervention strategies, which can significantly impact the quality of life for individuals affected by DMD.

The other age ranges presented do not align with the typical presentation and diagnostic timeline of DMD, further underscoring why the correct answer highlights the key age range of 3 to 5 years.