The term "crural" refers to the leg. There's no specific distinction between a "left crural" and a "right crural," as both legs are considered crural.

However, you might be thinking about specific anatomical structures within the leg.

Here are some possibilities:

* Left femoral artery: This is the main artery supplying blood to the leg, located in the thigh (femoral region).

* Left femoral vein: This is the main vein draining blood from the leg, also located in the thigh.

* Left crural nerve: This is a branch of the femoral nerve that innervates the anterior compartment of the leg.

* Left saphenous vein: This is a superficial vein in the leg that runs from the ankle to the groin.

If you can provide more context, I might be able to help you pinpoint the specific location you're looking for. For example, are you referring to a medical condition, an anatomical structure, or something else?