What is the prognosis for patients diagnosed with myotonia congenita?
Most individuals with myotonia congenita lead long, productive lives. Although muscle stiffness may interfere with walking, grasping, chewing, and swallowing, it is usually relieved with exercise.
Is myotonic dystrophy serious?
Congenital myotonic dystrophy is often apparent at birth. Characteristic features include weak muscle tone (hypotonia), an inward- and upward-turning foot (clubfoot ), breathing problems, delayed development, and intellectual disability. Some of these health problems can be life-threatening.
Does myotonia get worse over time?
Though myotonia congenita starts in childhood, it usually doesn’t get worse over time. You or your child should be able to lead a normal, active life with this condition. The muscle stiffness can affect movements like walking, chewing, and swallowing, but exercise and medicine can help.
Is myotonia congenita a disability?
The legs are more severely involved than the face or arms, and severe myotonia of the lower extremities may result in disability. Severe myotonic episodes may be associated with transient muscle weakness, especially in the hands.
Does myotonia worsen over time?
The outlook for myotonia depends on how severe your symptoms are and whether you have other conditions. In particular, periodic paralyses can become worse with age. People with severe cases of dystrophic myotonia may have shortened lifespans.
Is myotonia curable?
There is currently no cure or specific treatment for myotonic dystrophy. Ankle supports and leg braces can help when muscle weakness gets worse. There are also medications that can lessen the myotonia. Other symptoms of myotonic dystrophy such as the heart problems, and eye problems (cataracts) can also be treated.
What causes Steinert disease?
Type 1 DM (DM1), long known as Steinert disease, occurs when a gene on chromosome 19 called DMPK contains an abnormally expanded section located close to the regulation region of another gene, SIX5.
What is the mortality rate of muscular dystrophy?
The overall age-adjusted MD-associated mortality rate was 0.347 per 100,000 persons per year. The mortality rate was 0.523 for males, 0.182 for females, 0.220 for blacks, and 0.374 for whites. The mortality rate did not change over time for any group (figure e-2).
What is Curschmann-Batten-Steinert syndrome (CBS)?
Isolated case reports of myotonia had been published previously, including reports by Frederick Eustace Batten and Hans Curschmann, and type 1 myotonic dystrophy is therefore sometimes known as Curschmann-Batten-Steinert syndrome. The underlying cause of type 1 myotonic dystrophy was determined in 1992.
What is DM1 (Steinert disease)?
Each disorder is characterized by specific abnormalities (e.g. variation of muscle fiber size, muscle fiber necrosis, scar tissue formation and inflammation) in muscle biopsy from patients. DM1 is also known as Steinert disease, named after Dr. Steinert who, along with colleagues, first described the classic form in the medical literature in 1909.
What is the prognosis of late-onset pulmonary embolism (DM1)?
Life expectancy in non-congenital late-onset or adult onset DM1 is in the early 50s, with pulmonary complications being the leading cause of death, followed by cardiac complications. DM2 life expectancy has yet to be studied.