Which nerve might be implicated in pain radiating from the left groin to the medial thigh?

• A. Saphenous Nerve
• B. Femoral Nerve
• C. Obturator Nerve
• D. Common Peroneal Nerve

Answer: (A)

The left groin pain radiating to the medial thigh is likely associated with the saphenous nerve due to its anatomical distribution and function. The saphenous nerve is a branch of the femoral nerve and is primarily responsible for providing sensory innervation to the skin of the medial aspect of the leg. While it doesn't directly affect muscle function, pain in the distribution area of the saphenous nerve can occur due to various underlying conditions, such as hernias or other groin-related issues.

The femoral nerve is responsible for innervating the quadriceps muscle and providing sensation to the anterior thigh area; however, its involvement typically leads to symptoms in the anterior thigh rather than specifically the medial thigh.

The obturator nerve supplies the adductor muscles and provides sensory innervation to the skin in the upper medial thigh area. Although it could be considered in a differential diagnosis for groin pain, its main area of influence is more localized and less likely to cause symptoms radiating from the groin.

The common peroneal nerve primarily innervates the lower leg and foot, providing sensation to the anterior and lateral aspects, thus it is not typically implicated in pain originating from the groin radiating to the thigh region.

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