This information is provided by Provet for educational purposes only.
You should seek the advice of your veterinarian if your pet is ill as only he or she can correctly advise on the diagnosis and recommend the treatment that is most appropriate for your pet.
Lung cancer is a serious, potentially fatal disease which affects both cats and dogs from time to time. Successful treatment depends upon the type of cancer involved and early detection.
Lung cancer is a debilitating, potentially life-threatening disease which is seen in both cats and dogs.
The signs of lung cancer include :
There are two main types of the disease :
Primary lung cancer is less common than secondary lung cancer. When it occurs primary lung cancer can involve just one lung lobe, and so surgical removal can be successful. On the other hand secondary lung cancer is most likely to involve more than one lung lobe, and sometimes all lung lobes are affected - which makes surgical removal difficult or impossible. When surgical removal of metastatic cancer is possible long term disease-free survival can be expected in about 25% of the cases.
If the cancer cannot be removed surgically there are other forms of treatment which can be used including chemotherapy. There are several factors that will influence how successful medical treatment can be including :
Even if a complete cure is not possible, the use of chemotherapy can give a period of improvement in the clinical signs, and slow the progression of the disease (called a period of remission). When signs start again it is called a relapse.
In humans there is a high correlation between cigarette smoking and lung cancer, and between exposure to asbestos and a particular form of lung cancer called mesothelioma. Studies looking at lung cancer in pet dogs showed only a weak relationship between lung cancer and exposure to smoking in the home (so called "passive smoking"). However, there was no increased risk associated with the number of smokers in the house, greater numbers of cigarettes being smoked, or increased time spent indoors. Mesotheliomas are reported occasionally in animals.
There is a lower risk of contracting lung cancer in long-nosed (dolicocephalic) breeds of dog, than in short-nosed (brachycephalic) or medium-sized nose (mesocephalic) breeds of dog..
Updated October 2013