Genetic analysis is the gold standard test for the diagnosis of Duchenne muscular dystrophy.

Genetic analysis is the gold standard test for the diagnosis of Duchenne muscular dystrophy.

Investigations:

• Among the patients who present with clinical signs of Duchenne muscular dystrophy, the CK level is the most sensitive test for the diagnosis.
• Among the patients who present with clinical signs of Duchenne muscular dystrophy, the genetic analysis is the most specific test for diagnosis.

The following finding on performing genetic analysis is confirmatory for Duchenne muscular dystrophy:

• Different mutations such as deletion, duplication, and etc in dystrophin gene.

The various investigations must be performed in the following order:

• History and physical examination
• CK level
• Genetic analysis
• Muscle biopsy (if genetic analysis in negative)

Duchenne muscular dystrophy is primarily diagnosed based on clinical presentation and genetic testing. There are no established criteria for the diagnosis of Duchenne muscular dystrophy.