09/13/2026
As September is Muscular Dystrophy Awareness Month, I thought it would be important to recap on what Duchenne’s Muscular Dystrophy is.
What is it?
Duchenne’s Muscular Dystrophy (DMD) is a severe, progressive genetic disorder that causes muscle weakness and deterioration caused by a gene mutation passed down by the mother.
The DMD gene stops the body from making dystrophin, a key protein.
What is Dystrophin exactly?
Dystrophin is what gives muscles integrity. It acts like a shock absorber to protect muscle cells during movement. Without it, muscle cells get damaged easily and degenerate.
Why does the mother pass it, but mostly boys are afflicted?
It is X-linked recessive, so it mostly affects boys, while women are typically carriers. However, it can hapoen through spontaneous mutation. It will continue to be passed down after that though.
How did you know something was different with Hunter?
Symptoms usually show up between ages two and six.
Hunter was 5. Hunter was having trouble walking, running, and climbing stairs. He fell often, and we started noticing him walking on his toes. Then we started to see Gower's Sign (Children use their hands to push themselves up their legs and body when rising from the floor), and noticed his enlarged calves (Lower leg muscles often look thick because fat and connective tissue replace lost muscle). Because my mother was a manifesting carrier, we knew what we were seeing.
What does his diagnosis mean?
Hunter started by being able to walk run and climb (not ever as strong as peers, but still able to). Most boys need a wheelchair by age 12 - which is exactly when Hunter transitioned. Weakness eventually affects breathing muscles and the heart, leading to serious cardiopulmonary issues. This has started with Hunters pulmonary functioning already. He has machines at night, and nurses on nights I work keep a close watch on his breathing.
What is life expectancy for DMD boys?
Unfortunately no one has a crystal ball, but Complications usually become life-threatening by young adulthood (20’s) though better care helps patients live longer. Unfortunately some of our Duchenne’s Warriors don’t make it passed teenage years.
If you want to know more about Duchenne’s, definitely visit https://muscle.ca