# FCE in Cats: Symptoms, Causes, and What to Expect A spinal stroke, called fibrocartilaginous embolism or FCE, causes sudden weakness or paralysis that often affects the hind legs. FCE in cats symptoms appear within minutes, and the cat is usually not in pain. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - FCE is a spinal cord injury caused by a piece of disc material blocking a blood vessel in the spinal cord, not a blood clot traveling from the heart. - The most common sign is sudden hind-limb weakness or paralysis, often on one side or worse on one side, with the cat alert and usually comfortable. - Diagnosis is based on history, neurologic exam, and imaging to rule out other causes such as a clot, disc herniation, fracture, or cancer. - There is no specific drug that reverses FCE. Treatment is supportive nursing care, physical rehabilitation, and managing bladder and bowel function. - Many cats improve over weeks to months, but recovery varies. Some regain walking, some need a cart, and some have lasting deficits. ## What Is FCE in Cats? FCE stands for fibrocartilaginous embolism. It happens when a small fragment of fibrocartilage, usually from an intervertebral disc, enters the blood supply of the spinal cord and blocks it. The spinal cord tissue beyond the blockage loses oxygen and nutrients, which causes sudden loss of function. The term "embolism" can be confusing. In people, an embolism often means a clot that travels from elsewhere. In FCE, the material is disc cartilage, not a clot from the heart. This is why FCE is sometimes called a spinal stroke or fibrocartilaginous embolism. FCE is not the same as feline chronic enteropathy, which shares the same abbreviation in some veterinary research. Feline chronic enteropathies are long-term gastrointestinal diseases such as food-responsive enteropathy, inflammatory bowel disease, and low-grade intestinal T-cell lymphoma [1]. If your cat has chronic vomiting or diarrhea, that is a different problem. This article is about the spinal cord event. ## FCE in Cats Symptoms: What Owners Notice The hallmark is sudden onset. You may see your cat jump off a bed, yelp, and then be unable to use the back legs. Or you may find your cat dragging the hind limbs when you come home. Signs usually reach their worst within minutes to a few hours. Common signs include: - Weakness or paralysis of one or both hind legs - Loss of pain sensation in the affected limbs (your veterinarian will test this) - Knuckling or dragging the paws - Difficulty standing or walking - Loss of bladder control or inability to urinate - Loss of bowel control or constipation - Tail weakness or a flaccid tail - Normal alertness and appetite in many cats - Little or no crying or signs of pain Some cats have milder signs, such as a wobbly walk or a leg that gives out. Others have complete paralysis of both hind legs. The front legs are usually normal unless the embolism affects the cervical or thoracic spinal cord. A cat with sudden hind-limb paralysis needs urgent veterinary care. A blood clot, often linked to heart disease, can look identical to FCE. Other emergencies such as a spinal fracture, disc herniation, or severe urinary blockage can also cause sudden weakness or distress. If your cat is straining to urinate or cannot pass urine, that is an emergency. You can read more about urinary signs in [Symptoms Of Urinary Infection Cats](/knowledge/veterinary-medicine/symptom-guides/symptoms-of-urinary-infection-cats). ## What Causes FCE in Cats? The exact trigger is not fully understood. The accepted mechanism is that disc material enters the spinal cord's blood vessels and blocks flow. This can happen after a jump, a fall, or minor trauma, but many cats have no obvious injury. Risk factors are not well established in veterinary research. FCE has been reported in cats of various ages and breeds. Some reports suggest middle-aged to older cats are affected more often, but this is not a reliable rule. There is no proven link to diet, vaccines, or routine activity. Other causes of sudden hind-limb weakness in cats include: - Aortic thromboembolism, a blood clot that blocks blood flow to the hind legs, often in cats with heart disease - Intervertebral disc herniation - Spinal fracture or dislocation after trauma - Spinal cord infection or inflammation - Cancer affecting the spine or nerves - Nerve damage from diabetes or other metabolic disease - Severe electrolyte or metabolic problems Because these conditions look similar at first, your veterinarian cannot diagnose FCE by appearance alone. Tests are needed to rule out treatable and life-threatening causes. ## How FCE Is Diagnosed Your veterinarian starts with a full history. They will ask when signs started, whether your cat jumped or fell, whether the cat can urinate, and whether there is any known heart disease. The neurologic exam checks: - Which legs are affected - Whether the cat can feel the toes and limbs - Reflexes in the legs and tail - Whether the cat can urinate on its own - Whether the front legs and cranial nerves are normal Blood work and urinalysis help assess general health and look for metabolic causes. A heart ultrasound may be recommended if a clot is suspected. Advanced imaging is often needed. MRI is the preferred test to look at the spinal cord. It can show swelling or a lesion consistent with FCE and help rule out disc herniation, tumor, or infection. CT and myelography are alternatives in some cases. These tests require anesthesia or sedation and are usually done at a referral hospital. There is no simple blood test that confirms FCE. Definitive confirmation requires examining spinal cord tissue, which is not practical in a living cat. So the diagnosis is usually made by ruling out other causes and finding a pattern consistent with FCE. ## Treatment Options for FCE in Cats There is no medication that dissolves the fibrocartilage or restores the damaged spinal cord. Treatment focuses on supportive care, preventing complications, and rehabilitation. ### Nursing Care Cats with paralysis need help with basic needs: - Bladder care: Your veterinarian will show you how to express the bladder by hand if your cat cannot urinate. Some cats need a urinary catheter for a short time. - Bowel care: Constipation is common. Your veterinarian may recommend diet changes or medication. The dose is calculated from your cat's weight and health. - Skin care: Keep the cat clean and dry. Change bedding often. Check for sores or urine scald. - Positioning: Turn the cat every few hours if they cannot move on their own. Use padded bedding. ### Physical Rehabilitation Rehabilitation can help maintain muscle and improve function. Options include: - Passive range of motion exercises - Assisted standing and walking with a sling - Hydrotherapy or underwater treadmill at a rehab facility - Electrical stimulation in some cases - Acupuncture as a complementary therapy Ask your veterinarian for a referral to a rehabilitation specialist. A physical therapist can design a home program for your cat. ### Medications Your veterinarian may prescribe medications for pain, inflammation, or bladder issues. Corticosteroids are sometimes used, but their benefit for FCE is not proven. Never give human medications to your cat without veterinary guidance. Some common pain relievers are toxic to cats. If you are managing other conditions, see [Cat Allergy Medication Side Effects: What to Watch For](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-allergy-medication-side-effects). ### Monitoring Your cat will need follow-up visits to check neurologic function, bladder control, and skin condition. Your veterinarian may adjust the care plan based on progress. ## FCE Cats Prognosis: Recovery and Long-Term Management Recovery from FCE varies widely. Some cats regain the ability to walk within days to weeks. Others improve over several months. Some cats have permanent weakness or paralysis. The most important factor is whether deep pain sensation returns. If your cat can feel a strong pinch in the toes, the outlook is better. If deep pain is absent for more than a few weeks, the chance of walking again is lower. Your veterinarian will check this at each visit. Cats that do not regain walking can still have a good quality of life. Options include: - A customized cart or wheelchair - Indoor-only lifestyle with soft bedding - Regular bladder and bowel care - Physical therapy to prevent muscle contracture - Ramps and low-entry litter boxes Some cats recover fully. Others have a permanent wobbly gait or need help with urination. There is no way to predict the exact outcome on day one. Your veterinarian will reassess over time. If your cat has other serious conditions, such as heart disease or kidney disease, those need to be managed too. Cats with chronic enteropathy may have low cobalamin levels, which is common in that condition [2]. That is separate from FCE but can affect overall health. ## Prevention There is no proven way to prevent FCE. Because the trigger is often unknown, you cannot fully protect your cat. You can reduce the risk of spinal trauma by: - Keeping your cat indoors - Providing ramps or steps to favorite high spots - Avoiding rough play that involves twisting or falling - Using a carrier for car travel If your cat has heart disease, regular veterinary checkups can help monitor for clots. Your veterinarian may discuss medications if a clot risk is high. ## Limitations and When to Contact a Veterinarian FCE is a diagnosis of exclusion. Many conditions can look like FCE, and some are treatable or life-threatening. Only your veterinarian can determine the cause for your individual cat. Contact a veterinarian immediately if you see: - Sudden hind-limb paralysis or weakness (same day, emergency) - Inability to urinate or straining to urinate (emergency now) - Loss of bowel control or a swollen, painful abdomen (emergency now) - Crying, panting, or signs of severe pain (emergency now) - Open sores or urine scald on the skin (same day) - Fever, lethargy, or not eating (same day) - Any new weakness in the front legs or difficulty breathing (emergency now) If your cat is dragging the legs, keep them confined and quiet. Do not try to force them to walk. Use a towel as a sling under the belly to support them during transport. For general concerns or follow-up, call your regular veterinarian. They can advise whether you need an emergency visit or a routine appointment. ## Frequently Asked Questions ### What is the difference between FCE and a blood clot in cats? FCE is caused by disc cartilage blocking a spinal cord blood vessel. A blood clot, called aortic thromboembolism, usually blocks blood flow to the legs and is often linked to heart disease. Both cause sudden hind-limb weakness, but the underlying cause and treatment differ. ### Can a cat recover from FCE without surgery? Yes. FCE is not treated with surgery. Most cats receive supportive care, bladder management, and rehabilitation. Some cats regain walking ability over weeks to months, while others have lasting deficits. ### How long does it take for a cat to walk again after FCE? Some cats show improvement within days. Others take several weeks to months. If deep pain sensation is absent for more than a few weeks, the chance of walking again is lower. Your veterinarian will monitor progress at follow-up visits. ### Is FCE painful for cats? Most cats with FCE do not appear to be in pain. The spinal cord injury causes loss of function instead of pain. However, some cats may have mild discomfort from muscle strain or bladder distension. Your veterinarian can assess and treat any pain. ### Can FCE happen again in the same cat? Repeat FCE is uncommon but possible. There is no proven way to prevent it. Keeping your cat indoors and avoiding high jumps may reduce the risk of spinal trauma, but the trigger is often unknown. ## Related Articles - [Feline Panleukopenia: Symptoms, Diagnosis, Treatment & Prevention](/knowledge/veterinary-medicine/viral-diseases/feline-panleukopenia) - [FIP in Cats: Symptoms, Diagnosis, and How It Is Treated Today](/knowledge/veterinary-medicine/symptom-guides/fip-in-cats-symptoms-diagnosis-treatment) - [Symptoms Of Urinary Infection Cats](/knowledge/veterinary-medicine/symptom-guides/symptoms-of-urinary-infection-cats) - [Cat Allergy Medication Side Effects: What to Watch For](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-allergy-medication-side-effects) - [Ear Infections In Cats Symptoms](/knowledge/veterinary-medicine/symptom-guides/ear-infections-in-cats-symptoms) - [Pancreatitis In Cats Symptoms](/knowledge/veterinary-medicine/symptom-guides/pancreatitis-in-cats-symptoms) - [Seizures in Cats: Causes, Symptoms, and What to Do](/knowledge/veterinary-medicine/symptom-guides/cat-seizures-causes-symptoms) - [Anemia in Cats: Symptoms, Causes, and Blood Work Findings](/knowledge/veterinary-medicine/symptom-guides/anemia-in-cats-symptoms-causes) - [IMHA in Cats: Symptoms, Causes, and Treatment](/knowledge/veterinary-medicine/senior-and-chronic-care/imha-cats-symptoms-treatment) - [Cytauxzoon felis Bobcat Fever in Cats: Pathogenesis, Diagnosis, and Critical Care Management](/knowledge/parasites/pet-parasites/cytauxzoon-felis-cats-bobcat-fever-severe-mortality-diagnosis) ## References 1. [Fecal microbiota and concentrations of long-chain fatty acids, sterols, and unconjugated bile acids in cats with chronic enteropathy](https://pubmed.ncbi.nlm.nih.gov/38933703/). Frontiers in veterinary science, 2024. 2. [Serum Transcobalamin Concentration in Cats-Method Validation and Evaluation in Chronic Enteropathies and Other Conditions](https://pubmed.ncbi.nlm.nih.gov/39591326/). Veterinary sciences, 2024. ## Further Reading - [American Veterinary Medical Association: First Aid Tips for Pet Owners](https://www.avma.org/resources-tools/pet-owners/emergencycare/first-aid-tips-pet-owners) - [Merck Veterinary Manual: Cat Owners](https://www.merckvetmanual.com/cat-owners) - [Cornell Feline Health Center: Health Information](https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information)