Medicine
Lymphatic Drainage Pathways in Head and Neck Cancer Spread
Quick fact
The lymphatic drainage of the head and neck is so predictable that surgeons can often guess the primary tumor's location just by examining which lymph nodes are enlarged.
Why this is interesting
Why does a small cancer on the left side of the tongue often first appear as a lump on the left side of the neck? The answer lies in the lymphatic roadmap beneath your skin.