Canine Masticator Myositis in a Rottweiler Breed Dog

Canine masticator muscle myositis is an autoimmune disease which reasons are unclear. This muscle myositis generally seen in big dog breeds. General symptoms are pain and atrophy in the chewing muscle group, difficulty in opening jaw and weight loss. Our case was 2 years old, castrated male, rottweiler breed dog which was brought to our clinic with the complaints of face swelling and difficulty in chewing in 2 weeks. Complete blood count and serum biochemistry was carried out and eosinophilia was determined. We have used computed tomography to detect structural changes in masticatory muscles and diagnosed masticatory muscle myositis according to CT and laboratory test results. Cortisone treatment was started with out loosing any time and also laser therapy was added to the classical treatment to reduce pain. In the following days, because of the difficulty of the feeding and severe losing in body weight like reasons, euthanesia was recommended.