Muscular dystrophies are a heterogeneous group of inherited disorders that share similar clinical features. Being a rare disease, muscular dystrophy represents a huge diagnostic problem for clinicians. Clinically, muscular dystrophies are characterized by progressive muscle weakness, muscle atrophy, and movement disorders. The combination of clinical signs and analysis of the possible type of inheritance allows one to suspect specific forms of muscular dystrophy. Clinicians increasingly need to rely on electrophysiological, imaging, and genetic data for more accurate differential diagnosis. The paper presents the results of the combined use of magnetic resonance imaging of the thigh muscles and electromyography in 17 patients with muscular dystrophy.