Metastasis of carcinoma buccal mucosa goes to
Regional lymph node
Liver
Heart
Brain
The spread of carcinoma of buccal mucosa 

Buccal carcinoma spread locally and to regional lymph nodes.

1) Local spread: - From its site of origin, the lesion may spread deeply involving submucosa → muscle → Subcutaneous fat → skin. Involvement of buccinator muscle or anterior masseter causes trismus.
2) Lymphatic spread: - Nodal involvement occurs in about 50% of cases. Submandibular and later the upper jugular nodes may get involved. Upper jugular nodes may also be involved, directly skipping the submandibular group.