Detailed Instructions: In this task, you will be given a sentence. You need to reconize the name of the disorder or disease. Disease is a disorder of structure or function in a human, animal, or plant, especially one that produces specific symptoms or that affects a specific location and is not simply a direct result of physical injury. Although there might be several correct answers, you need to write one of them.
Q:  Using methylation - sensitive restriction enzymes , we characterized the methylation pattern on the 5 side of the CTG repeat in the DMPK gene of normal individuals and of patients affected with myotonic dystrophy , showing expansions of the repetitive sequence .
A:
myotonic dystrophy