4. Conclusion
Our case has demonstrated the effectiveness of readministering cetuximab as a salvage chemotherapeutic agent after administering nivolumab to a patient diagnosed as having a progressive disease for the recurrence of cervical lymph node metastasis after tongue cancer surgery. Our findings suggest that the immunostimulatory effect of nivolumab and reactivation of cetuximab enhance the antitumor effect of the therapy and highlight the need to accumulate more cases similar to ours to further validate the data.