
Canine cancer is a serious and often misunderstood topic. According to research, canine cancer is not contagious, meaning it cannot be spread from one dog to another.
However, there are some factors that can increase a dog's risk of developing cancer. For example, genetic predisposition is a significant contributor, with certain breeds being more prone to certain types of cancer.
Diet and lifestyle also play a role in cancer development. A study found that dogs fed commercial dog food were more likely to develop cancer than those fed a homemade diet.
On a similar theme: Lymphoma Diet for Dogs
What is Canine Cancer
Canine cancer is a complex and multifaceted disease that affects dogs of all ages and breeds. It's a leading cause of death in dogs, with over 1 in 4 dogs developing some form of cancer in their lifetime.
The most common types of canine cancer include lymphoma, mast cell tumors, and melanoma, which can occur in the skin, soft tissues, or internal organs. These cancers can be caused by genetic mutations, environmental factors, or a combination of both.
Some breeds, such as Golden Retrievers and Labrador Retrievers, are more prone to certain types of cancer due to their genetic predisposition.
Worth a look: What Breeds of Dogs Are Prone to Deafness
Types of Canine Cancer
Canine cancer can be a devastating diagnosis for pet owners, but understanding the different types can help you navigate the journey ahead.
Lymphoma is a common type of cancer in dogs, making up about 10-15% of all canine cancer cases. It's often seen in middle-aged to older dogs, particularly those with a family history of the disease.
Lymphoma can affect various parts of the body, including the lymph nodes, spleen, and bone marrow. It's a cancer that can be aggressive and spread quickly if left untreated.
Melanoma is another type of skin cancer that affects dogs, particularly those with fair skin and a history of sun exposure. It's often seen as a dark spot or growth on the skin, and can be malignant in about 50% of cases.
Mast cell tumors are a type of skin cancer that's common in dogs, particularly those with a breed history of the disease. They can be benign or malignant, and often cause symptoms like itching, swelling, and skin lesions.
Hemangiosarcoma is a rare but aggressive type of cancer that affects the blood vessels and heart in dogs. It's often seen in older dogs, particularly those with a history of bleeding disorders or anemia.
For more insights, see: Von Willebrand Disease in Doberman Pinschers
Causes and Risk Factors
Canine cancer is a complex and multifaceted disease, and understanding its causes and risk factors is crucial for prevention and early detection.
Genetic mutations can cause cancer in dogs, just like in humans.
Some breeds, such as Golden Retrievers and Labrador Retrievers, are more prone to certain types of cancer due to their genetic makeup.
Obesity is a significant risk factor for canine cancer, as it can lead to chronic inflammation and insulin resistance.
Diet plays a crucial role in canine cancer risk, with some studies suggesting that a high-carbohydrate diet may increase the risk of certain cancers.
Environmental factors, such as exposure to pesticides and chemicals, can also contribute to the development of canine cancer.
Vaccination is a common practice in canine healthcare, but some research suggests that over-vaccination may increase the risk of certain cancers in dogs.
As a dog owner, being aware of these risk factors can help you take proactive steps to reduce your dog's cancer risk and promote a long and healthy life.
Cancer Discovery
A type of cancer in dogs, known as Sticker's sarcoma, has been found to be contagious. This is a peculiar exception to the medical wisdom that cancer can't be caught.
Sticker's sarcoma is spread through direct contact between dogs, such as sex, biting, or licking. This means that a dog can potentially contract the cancer from another dog.
Scientists have gathered definitive evidence of the contagious nature of Sticker's sarcoma through genetic studies. They found that the tumor cells from 40 dogs with the cancer are not genetically related to the dogs they are in.
The tumor cells are clones of each other, meaning they are all progeny of the same parent cell. This suggests that the cancer has perpetuated itself by jumping from one dog to another.
The parent cell likely arose in a domesticated dog of Asian origin, possibly a husky, hundreds of years ago. This could have been more than 1,000 years ago.
Is Canine Cancer Contagious?
Yes, canine cancer is contagious, and it's a peculiar exception to the age-old medical wisdom that you can't "catch" cancer.
A type of cancer in dogs called Sticker's sarcoma is spread through sex, biting, or licking between dogs, and it's been found in dogs all over the world.
The cancer cells in Sticker's sarcoma are not genetically related to the dogs they're in, and they're all clones of each other, meaning they're all descended from the same parent cell.
This parent cell likely arose in a domesticated dog of Asian origin, perhaps a husky, hundreds of years ago, and has since been jumping from one dog to another.
There's another type of contagious cancer in dogs, called canine transmissible venereal tumor (CTVT), which is sexually transmitted and causes cancerous tumors on the genitalia of both male and female dogs.
CTVT has been found to have gone through 2 million mutations to reach its current state and is believed to have started developing in ancient dog species 11,000 years ago.
The fact that these cancers can be contagious is a curiosity of nature, and scientists are still learning more about how they spread and how to prevent them.
Sources
- https://www.ucl.ac.uk/news/2006/aug/study-finds-type-cancer-dogs-contagious
- https://www.theatlantic.com/science/archive/2019/08/ctvt-tumor-broke-all-rules/595246/
- https://www.ucl.ac.uk/news/2006/aug/contagious-canine-cancer
- https://en.wikipedia.org/wiki/Clonally_transmissible_cancer
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3918581/
Featured Images: pexels.com