A Siberian Husky's coat is thicker than that of most other dog breeds, comprising two layers: a dense undercoat and a longer topcoat of short, straight guard hairs. It protects the dogs effectively against harsh Arctic winters, but the coat also reflects heat in the summer.
Interstitial lung disease associated with RA typically includes interstitial pneumonias and bronchiolitis (inflammation of the small air passages of the lungs called the bronchioles), as well as damage to alveoli. The symptoms of interstitial lung disease include shortness of breath, pain, and difficulty breathing.1,2. The formation of nodules in the lungs occurs in a small minority of patients with RA (less than 1%). RA nodules are more common in men than women. Typically, nodules are asymptomatic.
The main target of RA's inflammation is the synovium, the thin layer of tissue that lines the joints. The inflammation also spreads to other areas in the body, which can cause ongoing pain, fatigue, and other problems.octors donât know exactly what causes RA. It may be a combination of genes and other things. Some researchers think an infection with a bacteria or virus can trigger the disease in some people, but so far, they donât know what virus or other organism does that.