In this research study the investigators want to screen Duchenne Muscular Dystrophy (DMD) patients for signs and symptoms of constipation in patients over 18.

The investigators hypothesized:

• DMD patients have a high prevalence of constipation than in the general population.
• Prevalence of constipation will increase with age and with worsening functional status.

The following procedures will take place during the study.

Constipation Assessment:

• The patient will be asked to complete a questionnaire about any symptoms of constipation.
• A physician from the study team will perform an abdominal physical exam
• The patient will have routine x-rays that monitor for spine compression fractures. These films will also be used to assess stool content.

Clinical Information The following information will also be collected during the clinic visit ;

• Age at diagnosis and genetic mutation
• Age at loss of ambulation if applicable
• Medications
• Functional status

Inclusion Criteria:

• Patients with a diagnosis of Duchenne Muscular Dystrophy (based on clinical presentation and verified by compatible muscle biopsy or known dystrophin gene mutation).
• Age greater than or equal to 18 years old

Exclusion Criteria:

• None

DMD patients 5-18 yr of age who are seen in a large interdisciplinary DMD center.