Facioscapulohumeral Muscular Dystrophy (FSH or FSHD) (Also known as Landouzy-Dej

Definition - One of nine types of muscular dystrophy, a group of genetic, degenerative diseases primarily affecting voluntary muscles.

Cause - A missing piece of DNA on chromosome 4.

Onset - Usually by age 20.

Symptoms - Weakness and wasting of the muscles around the eyes and mouth, and of the shoulders, upper arms and lower legs initially, with later weakness of abdominal muscles and sometimes hip muscles.

Progression - Progresses slowly with some periods of rapid deterioration. Disease may span many decades.

Inheritance - Autosomal dominant; the disease may be inherited through either the father or the mother, or it may occur without a family history.

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