Lateral femoral cutaneous nerve entrapment syndrome

Introduction of lateral femoral cutaneous nerve compression syndrome Lateral cutaneous cutaneous nerve compression syndrome (lateral cutaneous nerve dysfunction syndrome) refers to the nerve dysfunction caused by compression of a certain pressure factor in the passage of the nerve. Pain in the affected side, tingling, soreness or tearing pain, severe pain in the acute phase, and thigh pain in the thigh, but more than the knee, there are symptoms of numbness in the lower extremities, the pain is deep, the area is blurred, no obvious Distribution line. basic knowledge The proportion of illness: 0.003% Susceptible people: no specific population Mode of infection: non-infectious Complications: femoral neuralgia

The cause of lateral femoral cutaneous nerve compression syndrome

Causes:

Common causes of stress are:

1. The lateral femoral cutaneous nerve has an angle in the pelvic femoral part, combined with anatomical variation. When the limb is active and the position is not proper, the nerve is continuously pulled, rubbed, squeezed, etc., causing local tissue edema, scar formation, muscle tendons. The membrane sheath is thickened, causing nerve compression.

2. Pelvic fractures, tumors, foreign bodies, plaster compression of the lateral femoral cutaneous nerve, causing compression.

3. Surgical nerves when surgically cutting the humerus, or local scar adhesion and compression of the nerve.

4. The lumbosacral fascial hematoma caused by trauma or hemophilia can cause the intrinsic.

Pathogenesis:

The lateral femoral cutaneous nerve emerges from the outer edge of the psoas muscle, in the diaphragm, under the myofascial fascia, and over the anterior superior iliac spine, deeper than the circumflex, vein, at the outer end of the inguinal ligament Through, into the thigh, through the sartorius muscle and fascia, cloth on the outer side of the thigh skin, the lower end of which can reach the vicinity of the knee joint, sometimes, the nerve passes through the narrow fissure between the two parts of the fiber at the outer end of the inguinal ligament Go down into the outside of the strand.

When the nerve passes through the inguinal ligament under the anterior superior iliac spine, it almost changes from a horizontal position to a vertical position. When passing through the sartorius muscle, it can mutate and walk on the muscle, shallow or deep, about 10 cm below the anterior superior iliac spine, divided into anterior and posterior branches, the anterior branch is distributed in the anterior lateral skin of the femur, down to the knee; the posterior branch is distributed on the lateral aspect of the buttocks and the lateral skin of the femur 2/3, and the lateral femoral cutaneous nerve is in the pelvis The internal stroke is long, the angle of the pelvic part is formed, and the approach to the muscle is mutated. Therefore, a variety of factors can cause nerve compression.

Lateral femoral nerve compression syndrome prevention

There is no effective preventive measure for this disease. Early detection and early diagnosis are the key to the prevention and treatment of this disease.

Complications of lateral femoral cutaneous nerve compression syndrome Complications, femoral neuralgia

The main complication of this disease is that when the compression is severe and lasting, it can cause demyelination of nerve fibers, and even the distal axonal disintegration, Waller degeneration of myelin. During limb movement, nerve fibers in the stenotic channel undergo chronic inflammatory inflammation under mechanical stimulation and aggravate the vicious circle of edema-ischemia. This further causes damage, so patients with this disease should actively treat to prevent complications.

Lateral femoral cutaneous nerve compression syndrome symptoms Common symptoms Painful femoral bruises thighs tingling femoral nerve damage lateral thigh pain

The patient complained of anterior lateral numbness of the femoral sinus, acupuncture or burning pain. The symptoms were aggravated when walking. The symptoms were relieved during bed rest. There was tenderness in the lower part of the anterior superior iliac spine. The Tinels sign was positive, and the anterior lateral femoral sensation decreased or allergic. When the hip joint stretches the lateral femoral cutaneous nerve, the symptoms worsen.

In order to confirm the diagnosis and understand the cause of pressure, X-ray should be used to check the lumbar vertebrae, pelvis and hip for bone lesions, or other diagnostic techniques to exclude tumors, tuberculosis, inflammation or hemophilia.

Examination of lateral femoral cutaneous nerve compression syndrome

The patient complained of numb anterior lateral numbness, acupuncture or burning pain, increased symptoms when walking, and relieved symptoms during bed rest. There is tenderness in the lower part of the anterior superior iliac spine, where the Tinels sign is positive, and the anterolateral sensation is reduced or allergic. When the hip joint stretches the lateral femoral cutaneous nerve, the symptoms worsen.

X-ray examination can exclude lumbar, pelvic and hip bone lesions, CT and MRI can exclude tumors, tuberculosis and inflammation.

Diagnosis and diagnosis of lateral femoral cutaneous nerve compression syndrome

diagnosis

According to the medical history, the clinical manifestations of local tenderness, Tinels sign positive, increased symptoms after hip extension, can establish a diagnosis.

Differential diagnosis

1. Sciatica: Typical sciatica is radiation pain from the lower back to the buttocks, the back of the thigh, the outside of the calf, and the foot. The pain will increase in the case of increased abdominal pressure such as sneezing and coughing.

2, lateral femoral cutaneous neuritis: more common in men aged 20 to 50 years old and obese. Symptoms such as anterior lateral numbness, ant feeling, tingling, burning sensation, coldness, reduced sweating and heavy feeling can also occur, with numbness being the most common. Physical labor, when standing for too long, can be exacerbated, and symptoms can be alleviated after rest.

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