Bone Cancer (Osteosarcoma)

Health & Well Being
Bone Cancer (Osteosarcoma)

Osteosarcoma (bone cancer) is the most common type of cancer that affects the bones of dogs.

This cancer gradually eats away at the healthy bone tissue, leaving weaker, damaged bone which can break easily, even with normal activity. Affected dogs may have a noticeable hard swelling at the site of the cancer, or may simply go suddenly lame, almost overnight.

Bone cancer is mostly seen in larger breeds of dog with Greyhounds being the breed diagnosed most with this disease, followed by Rottweilers and Great Danes. Although most common in older greyhounds, the disease has no real age limits and can be seen in dogs of racing age, as well as in brood bitches and retired racers kept as pets. The risk of developing this disease increases with age, and one study in the UK found it accounted for almost 50% of all tumours seen in greyhounds.

Where is it commonly seen?

The most common sites for bone cancer to develop in the front leg are the shoulder and just above the wrist. In the hind leg the cancer tends to occur just above or below the knee/stifle.

The owner often reports that the dog has gone lame, and the area will often be swollen and painful to touch. Because it can appear so quickly, often owners assume the dog has simply hurt itself in the yard, or while exercising or playing with other dogs. The location of the swelling, amount of pain, and the appearance of the bone on x-ray are used to diagnose this disease. X-rays often show an area of bone that is very different from the normal bone above and below it, with a distinctive appearance described as ‘moth eaten’. Sometimes on x-ray it is also possible to see ‘pathologic’ fractures (breaks in the abnormal bone) which are the cause of a lot of the pain.

Confirmation of the diagnosis can be achieved via a bone biopsy or fine needle aspirate – where some of the cells from the affected area are removed and sent for examination by a pathologist.

What can be done if my greyhound has been diagnosed with Bone Cancer?

Unfortunately bone cancer is usually a very aggressive and nasty disease and malignant cancers can spread from their initial location to other places in the body such as the liver and lungs. Osteosarcoma is a type of cancer that spreads very early in the disease, often well before any signs or symptoms from the original tumour are visible.

Given this early spread, most dogs diagnosed with this disease have a very poor prognosis. It is estimated that most dogs will have a life expectancy of only a few months from the time of diagnosis. Treatment options include pain relieving medication, amputation of the affected limb, chemotherapy and radiotherapy.

Amputation of the affected limb is primarily done to control the pain associated with the area, and does not ‘cure’ the cancer. Without amputation, pain relief may work for a short time, but usually an inability to control the pain leads to the owner deciding to euthanase the greyhound. Greyhounds usually cope quite well with amputation, even though it seems to be a very drastic option. Amputation of the affected limb can increase the life expectancy from just weeks to an average of 4-6 months.

Chemotherapy is aimed at slowing the spread of the disease into other organs. Many owners do not consider chemotherapy because of the cost involved and the concern that their greyhound will suffer similar side effect to human chemotherapy patients (such as nausea and vomiting). Interestingly dogs are far less likely to suffer these types of reactions to the chemotherapy medication, and new chemotherapy drugs continue to be developed which are safer, more effective, and reduce the risks of unpleasant side effects.

Amputation followed by chemotherapy gives the best life expectancy, but the average survival time with this option is still only 10-12 months. If you are concerned that your greyhound has gone suddenly lame, especially if it is an older dog, it is important to have the dog checked by your veterinarian. They will be able to diagnose the problem, and discuss all of the available options and their likely outcomes with you so that you can make an informed decision.

Meet our dogs ready for adoption

All greyhounds adopted from GAP are de-sexed, vaccinated, microchipped, wormed and health checked.

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Lee

2 years old

How handsome is this young chap! Mr Lee here is a stunning, sleek, shiny boy that is just as sweet as he is handsome. Lee is still a young one getting to know the ropes so he can be a bit silly and on the go but he does sometimes step back and take it all in. He can be a little shy in new situations but soon forgets what he was worried about and is back to his usual playful self. We think Lee may suit living with children 10+ and maybe another medium or larger companion. He has requested a backyard though please as he wants to show you his epic zoomies and play till its nap time!

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Empire

3 years old

Well they all say Rome wasn’t built in a day, but perhaps you want to bring an Empire into your home and make it a kingdom of fun, laughter, cuddles and play time. Empire may suit many homes and living with children 10+ or maybe even another medium or larger canine buddy.

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Pickles

5 years old

Meet Pickles with his big floppy ears that makes him look like a cross breed! In new situations and environments, he can be a little unsure but doesn't take him long for his true colours to shine through and is super friendly and affectionate and if you're lucky he may even jump up for a cuddle! Pickles may suit living with or without a canine pal of similar size and children aged 10 years and older. This big playful boy will likely do best in a home with a backyard.
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Magpie

5 years old

Magpie is a lovely boy with a puppyish and playful nature. He's confident, social and outgoing, and loves to be the life of the party! This charming boy would likely be ok in a home with full time workers, and children aged 10 or older. He is looking for a backyard he can run and play in. Come meet this cool dude today!
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Emily

3 years old

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Meet Emily, a sweet and personable greyhound who's sure to capture your heart! This affectionate girl loves being around people and will shower her owners with love and attention. With her gentle nature, Emily's a perfect companion for families or individuals looking for a loyal friend. Emily's got a unique charm - one of her adorable ears flops forward, making her all the more lovable! She's looking for a household with or without kids aged 10+, where she can be the only dog or live with a medium to large dog. If you're looking for a loving and laid-back companion to bring joy to your life, Emily might be the perfect fit!
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Chonk ARP

2 years old

Don’t be fooled by his name, he isn’t a “Chonky Boy” but we think the name still suits him. Mr Chonk does however love a little treat or two so this should make training a breeze, as long as he doesn’t give you those puppy dog eyes for too many! Chonk is a confident and enthusiastic boy and we think that he may suit homes with children 10 and over and possibly another dog of any size.
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Ronnie

4 years old

Meet Ronnie, a charismatic and outgoing greyhound who's the life of the party! This confident and enthusiastic boy is an extrovert who loves being the centre of attention and making new friends. With his bold and adventurous nature, Ronnie's perfect for an active family who loves the outdoors. Ronnie's looking for a household with or without kids aged 10+, where he can thrive in an active home with a backyard to run around in. He's happy to be the only dog or live with a medium to large dog, but he's not suited for apartment living or elderly owners who can't keep up with his energetic personality. If you're looking for a lively and adventurous companion to join your active lifestyle, Ronnie might be the perfect match! Ronnie has an old hock fracture prior to entering GAP
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Scarlett

4 years old

Meet Scarlett, a sweet and pretty greyhound who's a total sweetheart! This affectionate girl loves being around people and adores a good scratch behind the ears - she's a total pampering princess! With her gentle nature, Scarlett's a perfect companion for families or individuals looking for a loving friend. Scarlett's looking for a household with or without kids aged 10+, where she can be the only dog or live with a medium to large dog. She'll need a backyard to stretch her legs and get some exercise. If you're looking for a beautiful and loving companion to bring joy to your life, Scarlett might be the perfect fit! Scarlett has a low-grade heart murmur and an old hock fracture. Neither of these affect her day-to-day life.
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Sophie

4 years old

Meet Sophie, a stunning and sweet greyhound who's sure to capture your heart! This pretty and outgoing girl is a social butterfly who loves meeting new people and making friends. With her affectionate nature, Sophie's always looking for someone to shower with love and attention. Sophie's looking for a household with or without kids aged 10+, where she can thrive as the only dog or live harmoniously with a medium to large dog. Having completed behavioural rehabilitation, Sophie's gained valuable skills and confidence, but she's not suited to homes with small dogs or cats. If you're looking for a beautiful and loving companion to bring joy to your life, Sophie might be the perfect fit! Sophie has an old Hock fracture with some arthritis in it. This doesnt affect her day-to-day life.
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Kara

7 years old

Doesn't Kara have the cutest face? She is a friendly girl with a puppyish and playful nature. Kara has been living as a pet for a few years now and returned due to no fault of her own. She has previously lived with greyhounds but we think she may be ok with another medium or larger breed as well. She can jump up, so no small children or frail owners for this girl. Kara is lovely to walk on lead and still very much an active girly. We also think she may be ok with children 10 years an over.
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