Saphenous Nerve
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The saphenous nerve.
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It lies medial within the adductor canal and then
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it exits the distal canal between the sartorius
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and gracilis, just distal to the knee joint.
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It becomes subcutaneous in the medial aspect
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of the knee and then it descends in the
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subcutaneous region along the medial aspect
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of the lower leg, coursing directly behind,
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there it is right there, directly behind
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our friend, the greater saphenous vein.
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Probably the most common cause of injury
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to this nerve, and there it is as we
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go up, and here it is as we go down,
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is stripping of the greater saphenous vein,
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which is often performed for cardiac
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bypass surgery or for venous insufficiency.
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Let's follow the greater
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saphenous vein nerve down.
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There it is.
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There's the vein in front of it.
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There's the nerve.
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There's the vein on T2.
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Let's keep following it.
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We can see it on this 3 Tesla
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scanner, and then we lose it
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momentarily, as it gets faint
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and has an oblique course.
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And then it comes back again a bit laterally.
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So as we go down, it starts to
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move a little bit posteriorly.
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Now we've lost it again,
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and there we see it, we find it again.
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Just along this protuberance of the
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anteromedial aspect of the talus.
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The saphenous nerve, a nerve that is injured
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more commonly, iatrogenically, than with a
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primary process in the ankle joint or lower leg.
Stephen J Pomeranz, MD
Chief Medical Officer, ProScan Imaging. Founder, MRI Online
ProScan Imaging
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