This report examines a case of masticatory muscle myositis in a dog.
Inflammatory disorders can affect the muscles of mastication.
Two types of inflammatory myopathies have been described. The histopathology and immunochemical features of this case suggest an immune mediated basis for this disorder. The diagnosis and treatment are described for this immune mediated inflammatory myositis. Photoactive compounds and drugs are used therapeutically as antibacterial, antiviral, and antitumor agents. Dramatic short-term improvement is reported with the dosage regimen and complications.