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So now, uh, starting

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with the lateral femoral cutaneous nerve,

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this is a purely sensory nerve

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that originates from the L two and L three nerve roots.

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It exits lateral to the, uh, SOAs muscle

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and will supply sensation to the lateral thigh.

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It fits entrapped.

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It's usually entrapped as it courses

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beneath the inguinal ligament,

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and it's called neuralgia paresthetica,

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and it will cause a burning pain

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and numbness in the lateral aspect of the thigh.

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The lateral femoral cutaneous nerve is usually compressed

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by, there's a mechanical compression at the

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inguinal ligament.

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So patients, uh, who are obese or in late pregnancy

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or at risk, uh, people who wear, uh, big belts

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with heavy tools, uh, trauma

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to the anterior superior iliac spine at the cyto version

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of the sartorious muscle, for example, or surgery.

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Uh, bone harvesting can cause injury to the, uh,

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lateral femoral cutaneous nerve.

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So here we have an example

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of the lateral femoral cutaneous nerve anterior

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to the sartorius muscle here,

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and a little bit more distally.

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You can see it branching out

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and you can see it reliably in the subcutaneous fat.

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Uh, so it's important to include the, uh,

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subcutaneous fat on your R imaging if the, uh, um,

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an injury to the lateral femoral cutaneous

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nerve is suspected.

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We look for any mass lesion or scar tissue.

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This is a patient who had an injury to his, uh,

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left iliac bone with some OCI fragments

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and develop a burning sensation along their lateral thigh.

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And on Mr. We were lucky to be able

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to see the lateral thermal cutaneous nerve

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because it's a small nerve here, was enlarged

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and with increased T two single, uh, proximal

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to the OCI fragments.

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Uh, because it's has a horizontal course over the iliac, uh,

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muscle, it's often difficult to identify, uh,

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on axial imaging.