What does FSHD look like?
FSHD may initially involve weakness of muscles of the face, shoulder girdle and arms. Facial weakness may result in limited movements of the lips, causing difficulties whistling, using a straw, or puckering the lips. Affected individuals may also develop a distinctive “mask-like” facial appearance.
How does FHS muscular dystrophy affect someone’s life?
The muscle weakness in FSHD tends to get worse slowly and does not usually affect life span. It often affects other muscles of the body, especially the lower legs, belly (abdomen), and hips. As FSHD gets worse, you may notice some of these other symptoms in your child: Difficulty lifting the feet (foot drop).
What is Facio Scapulohumeral dystrophy?
Facioscapulohumeral muscular dystrophy is a disorder characterized by muscle weakness and wasting (atrophy). This condition gets its name from the muscles that are affected most often: those of the face (facio-), around the shoulder blades (scapulo-), and in the upper arms (humeral).
Is FSH muscular dystrophy fatal?
FSHD usually progresses very slowly and rarely affects the heart or respiratory system. Most people with the disease have a normal life span.
Is FSHD life threatening?
Heart: Individuals with FSHD have a higher incidence of cardiac arrhythmias due problems with the atria (upper chamber of the heart). This can result in episodes of rapid heart beat or palpitations. These types of arrhythmias are not life threatening and require treatment in less than 5% of individuals with FSHD.
Does FSHD affect the brain?
Neuroradiological studies have also suggested CNS involvement in FSHD. A brain volumetric study, for example, has shown gray matter loss in FSHD, especially in the left precentral cortex, the anterior cingulated cortex and the right frontal region.
How is FSHD passed down?
FSHD affects both boys and girls. Either parent can pass it down to their children. This is an autosomal dominant inheritance pattern. A parent with the FSHD gene has a 1 in 2 chance of passing it on to each of their children.
Can FSHD skip a generation?
FSHD can appear to skip generations because some people with the FSHD genotype do not show symptoms. However, the genetic change does not skip generations. Also, it should be noted that the deletion size does not change when passed from generation to generation.
Does FSHD affect life expectancy?
Approximately one in four patients with FSHD require a wheelchair by age 50, as muscle degradation extends to foot and leg muscles. FSHD does not affect respiratory or cardiac muscles, so the disease usually does not have an impact on life expectancy.
How many people have FSH?
Estimates of frequency have varied from one in about 400,000 to one in 20,000.
What is the difference between FSHD 1 and 2?
FSHD is divided into two types based on the genetic cause. Type 1 accounts for 95 percent—or more than nine in ten—people with FSHD. Type 2 affects only 5 percent—or fewer than one in twenty—people with FSHD.
What gene causes FSHD?
FSHD is caused by ectopic expression of the germline transcription factor DUX4 gene in muscle cells. FSHD1 is associated with the deletion of a chromosomal tandem repeat called D4Z4 near the end of chromosome 4 at the 4q35 location.