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Lumbar cruralgia - Definition


Lumbar cruralgia is nerve pain starting in the lower back and spreading along a leg. It differs from sciatica nerve damage by the affected nerve root, but the causes and mechanisms underlying these two types of pain are identical. It may be due to a herniated disc, advanced degradation of intervertebral discs, or a tumor or other process compressing a nerve in the lumbar spine. Depending on which nerve is affected, the pain may extend into the hip, to the front of the thigh, or to the inside of the knee in case the pressure is on the nerve at the third lumbar vertebra, or in the outer portion of the upper thigh and at the back of the lower thigh, when pressure is on the fourth lumbar vertebra. An imaging test of the lumbar spine can identify the cause.