Kneecap Dislocation in Cats
Kneecap Dislocation in Cats - Symptoms, Causes, Diagnosis, Treatment, Recovery, Management, Cost
What is Kneecap Dislocation?
In the veterinary world, kneecap dislocation in cats is termed “feline luxating patella”. The patella is, of course, the medical term for kneecap and luxation means to dislocate. A luxating patella will cause the feline to display an unusual gait, as the knee joint cannot function as it would normally. Kneecap dislocation can be caused by a variety of reason that may or may not require immediate medical addition, which is why it is of the utmost importance for a veterinary professional to be consulted when signs are first noted. 
When your cat engages in physical activity and suddenly begins to limp, your feline could have suffered a kneecap dislocation. The knee, or stifle, of a cat has the identical structure of a human knee. The leg’s long bone (the femur) and two short bones (the tibia and fibula) are connected together with tendons to form the knee, as well as muscle to provide hinge movement to the leg. The kneecap, or patella, protects the knee and is housed in a groove known as the trochlear groove. When the kneecap dislocates, it means that the kneecap structure has “popped out” of the trochlear groove. 
Kneecap Dislocation Average Cost
From 369 quotes ranging from $200 - $2,000
Average Cost
$800
Wag Compare logo

Get a free pet insurance quote in less than 60 seconds!

Easily compare quotes from the most trusted pet insurance companies in the United States.

Get a quote

background
Symptoms of Kneecap Dislocation in Cats
Kneecap dislocation in cats will cause what veterinarians call mechanical lameness. The kneecap is causing an abnormal pull on the leg bones of the cat, mechanically inhibiting her from moving the leg in proper form. Mechanical lameness differentiates from standard lameness, as it does not cause the feline pain. Kneecap dislocation in cats will cause the feline to hold the affected hind leg abnormally, causing her to walk with a limp. Over time, affected cats have learned how to pop the kneecap back into place with a couple kicks of the leg, but this action will eventually damage the stifle structures and make the issue worse over time.
Types 
  • Medial Luxation (MPL): A medial luxated patella is the term used when the feline holds the leg outward from the body. 
  • Lateral Luxation (LPL): A lateral luxated patella is the term used when the feline holds the leg inward, toward the body. 
Causes of Kneecap Dislocation in Cats
Kneecap dislocation in cats can be caused by one of the following reasons:
  • A hereditary defect causing a congenital malformation 
  • Congenital malformation
  • Injury or trauma 
A kneecap dislocation following a traumatic event, such as a hit-by-car incident, is usually caused by an injury to the hip, leg, or knee itself. Injury or trauma related kneecap dislocation is normally just present in one of the hind legs and can often be reversed with surgical procedures. Hereditary or congenital kneecap dislocation, however, is an inherited mutation of the skeletal system, often affecting both hind limbs. The condition is present in the feline’s DNA, passed down from one or both parents to the offspring. Inherited kneecap dislocation can come and go, or become a permanent luxation over time. 
Diagnosis of Kneecap Dislocation in Cats
Diagnosis of kneecap dislocation in cats is fairly simple, as patellar luxation is initially diagnosed through direct palpation of the luxated patella. In other words, the veterinarian will use his/her hands to feel the kneecap pop in and out of place. Discussing your feline’s at-home symptoms and behavior, paired with a review of her medical history, will help confirm the diagnosis. To complete the diagnosis, the veterinarian will ask to have x-rays taken of the affected legs, which will completely confirm the diagnosis as well as indicate the extent of the problem. 
Treatment of Kneecap Dislocation in Cats
Kneecap dislocation in cats is graded by level of severity on a scale of one to four to determine whether or not the cat is a good surgical candidate. 
A level 1 grade patella luxation is the least severe. A cat with a level 1 grade kneecap dislocation can return the patella back to normal position easily and shortly after the issue occurs. Level 1 patella luxation does not normally require any treatment as felines can usually go their whole lives without the abnormality becoming an issue. However, as the cat ages and arthritis sets in, or if the cat becomes obese, the joint becomes too stressed to be left untreated. 
A level 4 grade patella luxation is the most severe. A cat with a level 4 grade kneecap dislocation cannot return the patella back to its normal location and it remains out of place indefinitely. A level 4 patella luxation can result in chronic lameness if left untreated and possibly the inability to use said leg at all in the future. 
Levels 1-2 patella luxation may not be surgically treated until a later date, if at all. However, level 3-4 patella luxation cases are strongly encouraged to seek surgical treatment to fix the problem before permanent damage is done. 
Petted logo

Worried about the cost of treating your pet's symptoms?

Pet Insurance covers the cost of many common pet health conditions. Prepare for the unexpected by getting a quote from top pet insurance providers.

Get a quote

background
Recovery of Kneecap Dislocation in Cats
Surgery is usually very successful for kneecap dislocation in cats, with about a 50 percent chance the condition will reoccur. After surgery, you will need to monitor your cat’s bandages and keep her in a quiet place to recover. Pain medication, anti-inflammatory drugs and/or an antibiotic may be sent home with the patient to be administered as instructed. Check-ups are a common occurrence during the recovery time and x-rays may be taken to ensure the stifle joint is in working order. It is not uncommon for your veterinarian to recommend physical therapy for your cat to help her to return to daily activity. The veterinarian may advise a few therapeutic movements to try at home or recommend an animal physical therapy professional.
Kneecap Dislocation Average Cost
From 369 quotes ranging from $200 - $2,000
Average Cost
$800
arrow-up-icon
Top
Kneecap Dislocation Questions and Advice from Veterinary Professionals
dog-breed-icon
Tortie (Cat)
dog-name-icon
dog-age-icon
1.5 years
thumbs-up-icon

2 found this helpful

thumbs-up-icon

2 found this helpful

My pet has the following symptoms:
Limping
My cat started limping a few weeks ago and our first vet initially told us she probably had an infection in her back left leg and put her on antibiotics. He did not find anything on the Xray so I think he just assumed our other cat scratched her and it caused an infection. She wasn’t getting better after a few weeks of antibiotics so I brought her to a different vet and he said she has a medial luxating patella and arthritis near her knee. I am trying to implement weight loss, glucosamine and chondroitin supplementation and rest but I feel like she just isn’t getting better.
Nov. 29, 2020
Answered by Dr. Michele K. DVM
2 Recommendations
Thank you for your question. From your description, it sounds like the treatment was very appropriate, whether it was for arthritis, a luxating patella, or an infection. If there is something larger going on with the joint, repeat x-rays may be helpful, as they can often compare to previous x-rays to see if there are changes. Radiographic changes can be subtle, and multiple views can help.
Nov. 29, 2020
Was this question and answer helpful?
dog-breed-icon
Ginger tabby
dog-name-icon
Peach
dog-age-icon
4 Months
thumbs-up-icon

3 found this helpful

thumbs-up-icon

3 found this helpful

My pet has the following symptoms:
Left Hind Knee Swollen
My cat 4month old cat has received an unknown injury to is left hind leg , the knee seems dislocated , unfortunately I do not live near a vet ,is there any way I can help her
July 25, 2018
Answered by Dr. Michele K. DVM
3 Recommendations
Without knowing what type of injury has happened, it is very difficult to recommend any treatment, and if the knee is dislocated, there is no home therapy that will help that. Most OTC pain medications are toxic to cats, and the best thing that you may be able to do if you can't have her seen by a veterinarian would be to confine her and make sure that her food, water and litter area close by while she heals.
July 25, 2018
Was this question and answer helpful?
dog-breed-icon
Unknown Tabby?
dog-name-icon
Hypnos
dog-age-icon
4 Years
thumbs-up-icon

2 found this helpful

thumbs-up-icon

2 found this helpful

My pet has the following symptoms:
Lethargy
Limping
Trouble Walking
My 4 year old kitty has been having trouble jumping up and running. He is getting lethargic and isn't walking well. This has been a sudden onset but has lasted a couple days. He shows no other signs of problems (is eating, drinking, and using the litter box regularly). He is not overweight.
July 19, 2018
2 Recommendations
It is possible that Hypnos has had a small injury which is causing pain and for him to not use the leg as much; without examining him I cannot determine whether there is an injury or if the symptoms are attributable to another cause. Try to keep him rested for the time being and prevent any running, jumping and playing; if there is no improvement over the weekend visit your Veterinarian. Regards Dr Callum Turner DVM
July 20, 2018
Was this question and answer helpful?
dog-breed-icon
DOMESTIC
dog-name-icon
Mia
dog-age-icon
2 Years
thumbs-up-icon

3 found this helpful

thumbs-up-icon

3 found this helpful

My pet has the following symptoms:
Limping
My two year old cat took a fall/misjudged a jump a few days ago. She immediately wasn't putting pressure on her back right leg, so I took her to the vet who believed it to be a patella luxation. The vet did not seemed to be concerned (didn't X-ray), prescribed 3 days worth of pain medicine, and advised rest. We are on day 3, and while she is putting more pressure on it, she is still limping with her leg slightly pointed outward. Does this mean her kneecap may still be displaced? How long should we expect a limp if her condition really is mild? Is there anything else we can be doing to moderate pain? Thank you!
June 21, 2018
3 Recommendations
An injury like this will take more than three days to recover from, but the worst may be over for now; Mia may be holding her leg in a certain position because it is more comfortable for her, similar to how we change our gait if we hurt our leg. Without examining Mia I cannot confirm whether the kneecap is dislocated or if there is another injury; continue to keep Mia rested but if there is an increase in pain once the pain medication has ended or there is no overall improvement you should return to your Veterinarian for a follow up examination. Regards Dr Callum Turner DVM
June 22, 2018
Was this question and answer helpful?
dog-breed-icon
stray
dog-name-icon
Little Cat
dog-age-icon
1 Year
thumbs-up-icon

0 found this helpful

thumbs-up-icon

0 found this helpful

My pet has the following symptoms:
Limping
Mild Swelling
Lateral Luxation
My cats back leg is either broke or her knee is dislocated. I felt her leg and she only starts to show discomfort when I get to her knee. From about her knee down to her foot is also turning in towards her body.
Feb. 10, 2018

Answered by Dr. Michele K. DVM
0 Recommendations
Thank you for your email. Without examining Little Cat, I'm not sure what might be going on with her leg, or what possible solutions there might be for her. It would be best to have her examined by a veterinarian, as they will be able to look at her, assess the leg, and determine the best course of treatment for her. I hope that she is okay.
Feb. 10, 2018
My 6old Bengal was perfect when I got her. About a month ago she limped on n off. She was examined during spay n was ok just loose kneecap/ligaments. Now a month later she consistently limps. Her vet says he's consulting some specialists, possibly surgery. Could this be from injury from playing w her mate? I know how rare this is. Will she grow out of it? How painful is it? She doesn't complain. Eating drinking n using litter normally. Just won't put pressure or jump. She's so young I'm afraid of her still growing it's too soon? Will it correct itself?? Heartbroken
March 24, 2018
Misty M.
Was this question and answer helpful?
Kneecap Dislocation Average Cost
From 369 quotes ranging from $200 - $2,000
Average Cost
$800
Wag Compare logo

Get a free pet insurance quote in less than 60 seconds!

Easily compare quotes from the most trusted pet insurance companies in the United States.

Get a quote

background
Need pet insurance?
Need pet insurance?

Learn more in the Wag! app

Five starsFive starsFive starsFive starsFive stars

43k+ reviews

Install


© 2025 Wag Labs, Inc. All rights reserved.


© 2025 Wag Labs, Inc. All rights reserved.