Duchenne muscular dystrophy (DMD)? is a genetic disorder characterized by progressive muscle degeneration and weakness. It is one of the most common and severe forms of muscular dystrophy.
DMD is caused by mutations in the DMD gene, which encodes a protein called dystrophin. Dystrophin helps keep muscle cells intact. Without it, muscle cells are easily damaged and eventually die.
Duchenne muscular dystrophy (DMD) itself is a specific type of muscular dystrophy, but within the broader diagnosis of DMD, there aren’t officially “types” in the same way as other muscular dystrophies (e.g., limb-girdle vs Becker). However, DMD can present variations or subtypes based on genetic mutations, clinical presentation, and disease progression. Here’s how DMD is typically classified or described in different contexts:
Duchenne muscular dystrophy (DMD) is a progressive muscle-wasting disorder that primarily affects boys. Symptoms typically begin in early childhood and worsen over time. Here’s a breakdown of common symptoms by category and age group:
Early Childhood Symptoms (Ages 2–5)
• Delayed motor milestones (e.g., walking late)
• Difficulty running or jumping
• Frequent falls
• Waddling gait
• Toe walking
• Gower’s sign: Using hands to “climb up” the legs to stand up from the floor
• Enlarged calf muscles (pseudohypertrophy – muscle replaced by fat and scar tissue)
Childhood to Early Teens (Ages 6–12)
• Progressive muscle weakness, especially in:
– Hips
– Thighs
– Pelvic area
– Shoulders
• Trouble climbing stairs or standing from sitting
• Fatigue
• Poor balance and coordination
• Difficulty raising arms
• Contractures (tight muscles and joints)
• Scoliosis (curved spine) as muscles weaken
• Loss of ambulation (most children require a wheelchair by age 12)
Late Symptoms (Teens to Adulthood)
• Cardiomyopathy: Weakening of the heart muscle
• Respiratory weakness:
• Trouble breathing
• Need for ventilatory support
• Swallowing difficulties
• Cognitive or learning disabilities (in some cases)
• Speech and language delays
You should seek medical help for Duchenne muscular dystrophy (DMD) as soon as you notice signs of delayed development or muscle weakness, especially in young boys. Early diagnosis is critical for starting supportive care and considering treatments that may slow progression.
Treatment for Duchenne muscular dystrophy (DMD) focuses on slowing disease progression, managing symptoms, and improving quality of life. While there is no cure, a combination of medications, therapies, and supportive care can make a significant difference.
1. Medications
2. Physical & Occupational Therapy
3. Respiratory Support
4. Cardiac Care
5. Educational & Psychological Support
6. Gene Therapy (Experimental/Emerging)
7. Multidisciplinary Care Team
