Collectors from the medial upper arm drain into which lymph node region?

• A. Parasternal
• B. Supraclavicular
• C. Popliteal
• D. Axillary

Answer: (D)

Collectors from the medial upper arm drain into the axillary lymph node region. The upper limb’s lymphatic drainage mainly funnels toward the axillary nodes, which collect lymph from both superficial and deep pathways traveling up the arm. While some medially located chest-wall or breast lymphatics feed into the parasternal (internal thoracic) nodes, the arm itself—the medial portion included—primarily exports its lymph toward the axillary node groups. The other options correspond to areas whose drainage is not the main pathway for the upper arm: parasternal handles medial chest/breast drainage, supraclavicular nodes collect from portions of the neck and chest region, and popliteal nodes are in the leg. Therefore, routing toward the axillary region best fits the typical drainage pattern for collectors from the medial upper arm.