Sometimes it could spread to the central nervous system, depending on the type of carcinoma and how it’s classified. When it metastasizes, it may spread to the lymph nodes, as well as spread to thorax tissues. Unfortunately, canine lung cancer in both forms is aggressive and can spread very quickly. So, if a dog that first got cancer in their mouth for instance, or in their bones, they risk the chance of it metastasizing through the bloodstream to the lungs. The second kind of lung cancer in dogs is called metastatic lung cancer, which means the cancer originated somewhere else in the body, but has spread to the lung. Primary lung cancer tumors are often malignant, and usually are visible as a mass on the lung when a chest x-ray is taken. However, the number does seem to be increasing, though experts aren’t sure whether that’s because there is an increase in this type of canine cancer, or if it’s simply because of improved diagnostic capabilities and equipment. Currently this type of cancer accounts for less than 1% of all canine cancers, so it is considered relatively uncommon. The first is primary lung cancer, which is where a tumor originates in your dog’s lung or lungs. In canines, there are typically two main types of lung cancer. Because the lungs are such an important organ, a lung cancer diagnosis is very serious indeed. Lungs are designed to move oxygen from the air into the blood stream, and then let carbon dioxide in the blood stream back out into the atmosphere. Lungs are a vital organ in both humans as well as dogs, and one of the most important organs in the respiratory system that canines possess.
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