Which structure drains lymph directly into the parasternal (internal mammary) nodes?

• A Medial quadrant of the breast and anterior upper abdominal wall ✓
• B Lateral quadrant of the breast and axillary tail
• C Upper limb superficial fascia
• D Anterior triangle of the neck

Explanation

Parasternal nodes run along the internal thoracic vessels beside the sternum and receive lymph from the medial quadrants of the breast, the anterior chest wall, and the upper part of the anterior abdominal wall. Their efferents join the bronchomediastinal trunks. The lateral breast quadrants drain mainly to axillary nodes, the upper limb drains to axillary nodes without parasternal relay, and the anterior neck drains to cervical chains.

Reference: Gray's Anatomy for Students, 4th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

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