Abstract
We report a case of metastatic papillary thyroid carcinoma and undifferentiated nonkeratinizing nasopharyngeal carcinoma to the same cervical lymph node following chemotherapy for mantle cell lymphoma. Total thyroidectomy, right cervical nodal dissection, radioactive iodine-131 therapy and radiotherapy to the nasopharynx and the neck resulted in remission of both tumors. No recurrence was noted in follow-up for 48 months.