The risk of lymph node spread related to the primary site of the cancer

Site of Primary Lymph Nodes Metasases Nasopharynx 86 - 90% Hypopharynx 52 - 78% Base of Tongue 50 - 83% Tonsil Fossa 50 - 76% Pharyngeal Wall 50 - 71% Supraglottic Larynx 31 - 64% Oral Tongue 34 - 65% Floor of Mouth 30 - 59%

for more detailed risk of nodes by site and stage go here