Fibrocartilaginous Embolic Myelopathy (Circulatory Disorder in the Spinal Cord Due to Blood Vessel Occlusion) in cats
- Occurrence: very rare
- Location of illness: Back/Tail
When to visit the vet?
Urgent see a veterinarian within 24 hours
If the condition worsens / symptoms persist, consult a veterinarian.
Definition
Fibrocartilaginous embolic myelopathy (FEM) is a sudden spinal cord injury in cats caused by a blockage of the blood supply to the spinal cord due to a fibrocartilaginous embolus.
The most important facts at a glance
Fibrocartilaginous embolic myelopathy (FCEM) is a rare condition in cats caused by a small piece of cartilage material originating from the intervertebral discs that enters the blood vessels of the spinal cord. This can interrupt blood supply and lead to nerve damage, manifesting through symptoms such as sudden pain, paralysis, and uncoordinated gait. The exact causes are not fully understood, but traumatic events or specific spinal movements may play a role. Diagnosis requires a thorough examination, often using imaging techniques such as MRI. There is no specific treatment to dissolve the embolus, but physiotherapy and supportive measures can promote recovery. The prognosis depends on the severity of symptoms; mild cases often have a good prognosis, while more severe cases can lead to permanent damage. Prevention is difficult as the condition is unpredictable, but a balanced diet, regular veterinary examinations, and a low-stress environment can reduce overall health risks. A veterinarian should be consulted if sudden behavioral changes occur.
Causes
Fibrocartilaginous embolic myelopathy is a rare condition that occurs in cats when a small piece of cartilage material enters the blood vessels of the spinal cord. This cartilage material typically originates from the intervertebral discs, the structures between the vertebrae that act as cushions and allow spinal movement.
Normally, the intervertebral discs are protected by a firm outer layer, but under certain circumstances, injury or a degenerative process can cause the cartilage material to be released. When this material enters the bloodstream of the spinal cord, it can block one or more vessels, leading to an interruption of blood supply to the affected area.
The lack of blood supply leads to oxygen deprivation (ischemia) in the affected areas of the spinal cord, resulting in nerve damage and loss of function in the corresponding body parts. These emboli can occur randomly and typically affect only a portion of the spinal cord.
The exact causes of fibrocartilaginous emboli are not yet fully understood. Some theories suggest that traumatic events or specific spinal movements may promote the release of cartilage material. However, there is no specific proven cause, and the condition can occur in any cat regardless of age, sex, or breed.
Symptoms
Symptoms of fibrocartilaginous embolic myelopathy typically appear suddenly and can vary depending on the location and severity of the vascular occlusion. Cats often show sudden weakness or paralysis in one or more limbs. These symptoms typically occur within minutes to hours after the event.
Affected cats may have difficulty standing or walking, and uncoordinated movement (ataxia) may be observed. The severity of symptoms ranges from mild movement restrictions to complete paralysis of one or more limbs.
The affected areas may also have reduced or no pain sensation. Some cats may also develop bladder or bowel problems if the nerve supply to these organs is affected. Generally, the condition is not associated with pain, as the embolus does not normally cause an inflammatory response.
Diagnosis
Diagnosis of fibrocartilaginous embolic myelopathy requires a thorough clinical examination by a veterinarian. A detailed medical history and observation of symptoms are crucial to rule out other causes of neurological deficits.
Imaging techniques such as magnetic resonance imaging (MRI) are the gold standard for diagnosing this condition. MRI can help determine the exact location and extent of spinal cord damage. X-rays or computed tomography (CT) may also be used, but are less effective at visualizing soft tissue damage in the spinal cord.
In some cases, cerebrospinal fluid analysis may be performed to rule out other inflammatory or infectious causes. It is important to rule out other possible causes of symptoms such as herniated discs, tumors, or infections.
Therapy
There is no specific medical treatment to dissolve the embolus itself, as the condition is often self-limiting and the embolus cannot be surgically removed. Treatment therefore focuses on supporting the cat during the recovery phase.
Physiotherapy and targeted movement therapy are essential components of treatment to promote recovery of the affected muscles and nerves. In severe cases, intensive care may be required to mobilize the cat and prevent complications such as pressure sores or muscle atrophy.
Medications such as anti-inflammatory drugs or corticosteroids may be used in some cases, although their effectiveness in treating FCE is controversial. They are typically used to control any secondary inflammatory conditions that may occur due to spinal cord damage.
Prognosis and follow-up care
The prognosis for cats with fibrocartilaginous embolic myelopathy varies greatly and depends on the severity of the initial symptoms and the affected area of the spinal cord. Cats with mild symptoms have a good prognosis and can recover completely.
In more severe cases where complete paralysis occurs, recovery may be incomplete, and some cats may retain permanent neurological deficits. The recovery process can take several weeks to months.
It is important to note that the disease is rarely life-threatening, and many cats can achieve a good quality of life with appropriate care and treatment.
Prevention
Fibrocartilaginous embolic myelopathy (FCEM) in cats is a difficult-to-predict condition, making prevention challenging. Nevertheless, there are some general measures that can reduce the risk of spinal cord problems. A balanced diet is crucial to support the cat’s overall health and minimize the risk of being overweight, which could potentially strain the spine. Regular veterinary examinations are also important to monitor the cat’s overall health and detect potential problems early.
Since stress can be a factor that negatively affects health, it is advisable to create a low-stress environment for the cat. This can be achieved through adequate hiding places, regular play, and a stable routine. Providing high-quality scratching and climbing materials can also help strengthen the cat’s muscles and promote mobility.
Although direct prevention measures specifically against FCEM are limited, these general health measures can help increase the animal’s overall resistance to various diseases. Additionally, it is important to watch for sudden changes in the cat’s behavior or mobility and consult a veterinarian quickly if abnormalities are noticed.