Cephalic vein drains into
**Core Concept**
The cephalic vein is a superficial vein in the arm that plays a crucial role in the venous drainage of the upper limb. Understanding the anatomical course and termination of the cephalic vein is essential for surgeons and medical professionals performing procedures in this region.
**Why the Correct Answer is Right**
The cephalic vein originates from the lateral end of the dorsal venous network of the hand and ascends along the lateral border of the biceps brachii muscle. It then passes through the deltopectoral triangle, where it anastomoses with the thoracoacromial vein. The cephalic vein eventually empties into the axillary vein, which is a major tributary of the venous system. This connection is vital for preventing venous congestion and ensuring proper blood flow to the upper limb.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the cephalic vein does not drain into the basilic vein, which is another superficial vein in the arm that ascends along the medial border of the biceps brachii muscle.
**Option B:** This option is incorrect because the cephalic vein does not drain into the median cubital vein, which is a superficial vein that connects the cephalic and basilic veins.
**Option C:** This option is incorrect because the cephalic vein does not drain into the brachial vein, which is a deep vein in the arm that drains into the axillary vein.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the cephalic vein is often used as a landmark for procedures such as axillary lymph node dissection and breast surgery. Knowledge of its anatomical course and termination is crucial for surgeons to avoid damaging this vein and ensure proper venous drainage.
**Correct Answer: D. Axillary Vein**