Which of the following sequences correctly describes the efferent drainage pathway from the deep inguinal lymph nodes?

• A. Right or Left Lumbar Trunks -> Gastrointestinal Trunk -> Cisterna Chyli -> Thoracic Duct -> Left Venous Angle
• B. Pelvic Lymph Nodes -> Lumbar Lymph Nodes -> Lumbar Trunks -> Cisterna Chyli -> Thoracic Duct -> Left Venous Angle
• C. Popliteal Nodes -> Lumbar Trunks -> Cisterna Chyli -> Thoracic Duct -> Right Venous Angle
• D. Lumbar Lymph Nodes -> Lumbar Trunks -> Cisterna Chyli -> Thoracic Duct -> Right Venous Angle

Answer: (B)

Efferent drainage from the deep inguinal lymph nodes follows a proximal path that leads to the thoracic duct, which means it moves first into pelvic lymph nodes (primarily the external iliac group), then into lumbar (para-aortic) lymph nodes via the lumbar trunks. From there, lymph collects in the cisterna chyli, ascends through the thoracic duct, and finally drains into the left venous angle (where the thoracic duct joins the left subclavian–internal jugular junction). This route fits the lower body drainage pattern and explains why the left, not the right, venous angle is the destination. The other sequences either place drainage into the right-side stream or jump to distal nodes in a way that doesn’t reflect the normal ascent via the cisterna chyli and thoracic duct.