Legg-Calvé-Perthes disease – unfamiliar name, familiar condition?

Legg-Calvé-Perthes disease is also known as aseptic (= without the involvement of pathogens) femoral head necrosis (= death of the femoral head) and describes a non-inflammatory growth disorder in young dogs. It mainly affects miniature dog breeds and small dogs between the ages of three and ten months.

INHALT
Origin and cause Symptoms Diagnosis Treatment Forecast
Origin and cause

As a result of impaired blood circulation in the growth plate of the femoral head (the head of the thigh bone), the bone loses its resistance and begins to deform. As the condition progresses, cartilage and bone tissue continue to break down, leading to osteoarthritis in the hip joint. The exact cause of the circulatory disorder remains unclear. Hereditary and autoimmune factors are suspected.

Symptoms

The disease can occur on one or both sides. Affected animals usually show signs of lameness on one or both sides and pain in the hip area. Mobility of the hip joint may be restricted and, as the disease progresses, muscle wasting may occur in this area. The animals begin to increasingly favor the affected leg until they eventually stop putting any weight on it. By the time clinical symptoms appear, destruction of the femoral head is often already well advanced.

Diagnosis

After a detailed preliminary report and a thorough clinical examination, the attending veterinarian can usually make an initial diagnosis. To confirm the diagnosis and rule out other diseases with similar symptoms, an additional X-ray examination is usually performed. The X-ray image allows for a precise assessment of the joint space, the growth plate, and the condition of the femoral head.

X-ray image of a dog's hip
The X-ray shows the deformation of the femoral head
Treatment

Conservative treatment with painkillers and strict restriction of movement usually does not bring the desired success, as the changes are already too advanced at the time of diagnosis. In most cases, therefore, surgical intervention is necessary to help the affected animals. In this operation, known as femoral head and neck resection, the head and neck of the thigh bone are removed. Connective tissue then forms between the remaining thigh bone and the hip socket, creating a kind of "replacement joint" that allows pain-free movement. In the first few weeks after the operation, the healing process, mobility, and muscle development can be promoted with the help of supportive physical therapy.

This surgical procedure allows animals to continue living a virtually pain-free life. As the owner, you should simply ensure that your dog gets regular exercise. Very intense exercise or irregular movement should be avoided.

Forecast

If the operation is performed early, the prognosis is good. Lameness is rarely a lasting effect. Since most of these dogs are very small, their limbs are exposed to significantly less stress than is the case with large and heavy dogs.