Facioscapulohumeral MD can affect both men and women. It tends to affect men slightly more than women, although the reason for this is unclear. Men also tend to be affected earlier and more severely.
About one in three people with facioscapulohumeral MD are unaware of any symptoms until well into adulthood. Others develop problems in early childhood. The condition tends to progress slowly.
Signs in your child may include:
Teenagers or adults may have shoulder aches, rounded shoulders or thin upper arms. As the condition progresses, it usually affects the muscles in the:
Around half of all people with facioscapulohumeral MD develop weakness in their leg muscles, and one or two in every 10 people with the condition will eventually need a wheelchair.
Facioscapulohumeral MD can develop unevenly, so the muscles on one side of the body may be affected more than the other. As the condition progresses slowly, it doesn't usually shorten life expectancy.