This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
Metastasis of ca buccal mucosa goes to 
Select and explain. 
A. Hea, B. Brain, C. Regional lymph node, D. Lungs
C: Regional lymph node
Answer: C: Regional lymph node 
Explanation: Tumors in this area have a propensity to spread locally and to metastasize to regional lymphatics . Lymphatic metastasis of Buccal ca go to submandibular and later upper jugular nodes. MC type of Buccal ca - Squamous cell ca Commonest site of origin - angle of mouth or the line of occlusion of upper and lower teeth