Tongue cancer surgery lymph node dissection after metastasis?

Tongue cancer may also metastasize after lymph node dissection.

once lymph node metastasis occurs, there may be a large number of cancer cells entering the lymphatic duct, and surgical lymph node dissection can only clear the visible lesions, hidden in the lymphatic duct cancer cells and can not be cleared, so even after the dissection there is still the possibility of recurrence.