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types

There are nine major forms of Muscular Dystrophy (MD).

MD symptoms can appear at any stage in life. Usually, its form and severity are determined in part by the age at which it occurs. Some types of MD affect only males. Some people with MD enjoy a normal life span, with mild symptoms that progress very slowly. Others experience swift and severe muscle weakness and wasting, dying in their late teens to early 20s.
The various types of MD affect more than 50,000 Indian(There is no accurate surveys are available). Fortunately, through advances in medical care, children with MD are living longer than ever before.

Duchenne Muscular Dystrophy (DMD)

The most common form of muscular dystrophy in children, Duchenne muscular dystrophy affects only males. It appears between the ages of 2 and 6. The muscles decrease in size and grow weaker over time yet may appear larger. Disease progression varies, but many people with Duchenne (1 in 3,500 boys) need a wheelchair by the age of 12. In most cases, the arms, legs, and spine become progressively deformed, and there may be some cognitive impairment. Severe breathing and heart problems mark the later stages of the disease. Those with Duchenne MD usually die in their late teens or early 20s.

Microscopic image of the calf muscle from a person with Duchenne muscular dystrophy. Cross section of muscle shows extensive replacement of muscle fibers by fat cells.

Becker Muscular Dystrophy (BMD)

This form is similar to Duchenne muscular dystrophy, but the disease is much milder. Symptoms appear later and progress more slowly. It usually appears between the ages of 2 and 16 but can appear as late as age 25. Like Duchenne muscular dystrophy, Becker muscular dystrophy affects only males (1 in 30,000) and causes heart problems. Disease severity varies. Those with Duchenne can usually walk into their 30s and live further into adulthood.

X-linked recessive is the manner in which this condition is inherited.

Limb-girdle Muscular Dystrophy (LGMD)

This appears in the teens to early adulthood and affects males and females. In its most common form, Limb-girdle muscular dystrophy causes progressive weakness that begins in the hips and moves to the shoulders, arms, and legs. Within 20 years, walking becomes difficult or impossible. Sufferers typically live to middle age to late adulthood.

Protein MYOT (also known as TTID one of the many genes whose mutations are responsible for this condition).

 
Myotonic Muscular Dystrophy (MMD or Steinert’s disease)

The most common form of muscular dystrophy in adults, myotonic muscular dystrophy affects both men and women, and it usually appears any time from early childhood to adulthood. In rare cases, it appears in newborns (congenital MMD). The name refers to a symptom, myotonia — prolonged spasm or stiffening of muscles after use. This symptom is usually worse in cold temperatures. The disease causes muscle weakness and also affects the central nervous system, heart, gastrointestinal tract, eyes, and hormone-producing glands. In most cases, daily living isn’t restricted for many years. Those with myotonic MD have a decreased life expectancy.

Myotonic dystrophy is inherited in an autosomal dominant pattern.

 
Facioscapulohumeral Muscular Dystrophy

Facioscapulohumeral refers to the muscles that move the face, shoulder blade, and upper arm bone. This form of muscular dystrophy appears in the teens to early adulthood and affects males and females. It progresses slowly, with short periods of rapid muscle deterioration and weakness. Severity ranges from very mild to completely disabling. Walking, chewing, swallowing, and speaking problems can occur. About 50% of of those with facioscapulohumeral MD can walk throughout their lives, and most live a normal life span.

General body structure of affected patient.

 
Congenital Muscular Dystrophy

Congenital means present at birth. Congenital muscular dystrophies progress slowly and affect males and females. The two forms that have been identified are Fukuyama and congenital muscular dystrophy with myosin deficiency. They cause muscle weakness at birth or in the first few months of life, along with severe and early contractures (shortening or shrinking of muscles that causes joint problems). Fukuyama congenital muscular dystrophy causes abnormalities in the brain and often seizures.

General body structure of affected patient.

 
Congenital Muscular Dystrophy

Congenital means present at birth. Congenital muscular dystrophies progress slowly and affect males and females. The two forms that have been identified are Fukuyama and congenital muscular dystrophy with myosin deficiency. They cause muscle weakness at birth or in the first few months of life, along with severe and early contractures (shortening or shrinking of muscles that causes joint problems). Fukuyama congenital muscular dystrophy causes abnormalities in the brain and often seizures.

Autosomal recessive is generally the manner in which CMD is inherited.

 
Oculopharyngeal Muscular Dystrophy

Oculopharyngeal means eye and throat. This form of muscular dystrophy appears in men and women in their 40s, 50s, and 60s. It progresses slowly, causing weakness in the eye and face muscles, which may lead to difficulty swallowing. Weakness in pelvic and shoulder muscles may occur later. Choking and recurrent pneumonia may occur.

Autosomal dominant in majority of cases (autosomal recessive minority).

Distal Muscular Dystrophy

This group of rare diseases affects adult men and women. It causes weakness and wasting of the distal muscles (those farthest from the center) of the forearms, hands, lower legs, and feet. It is generally less severe, progresses more slowly, and affects fewer muscles than other forms of muscular dystrophy.

Protein DYSF (one of the many genes whose mutations are responsible for this condition).

Emery-Dreifuss Muscular Dystrophy

This rare form of muscular dystrophy appears from childhood to the early teens and affects only males. It causes muscle weakness and wasting in the shoulders, upper arms, and lower legs. Life-threatening heart problems are common and can also affect carriers — those who have the genetic information for the disease but do not develop the full-blown version (including mothers and sisters of those with Emery-Dreifuss MD). Muscle shortening (contractures) occurs early in the disease. Weakness can spread to chest and pelvic muscles. The disease progresses slowly and causes less severe muscle weakness than some other forms of muscular dystrophy.

FHL1 is one of the genes where mutations occur that in turn cause Emery–Dreifuss muscular dystrophy.

Mobility in Dystrophy (MIND) Trust was formed in 2017, by us patients suffering from Muscular Dystrophy (MD) & Spinal Muscular Atrophy (SMA). In 2016, we started off as a small Whatsapp group of patients reaching out to each other. 

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