 The dominant mass centered in the right retromolar trigone seen previously has markedly decreased in size with patchy non-masslike enhancement seen in this region. The enhancement abuts the right cervical internal carotid artery. Large left level 2 lymph node seen previously is also smaller measuring up to 10 mm today compared to 19 mm previously. Additional enhancing nodule along the left lateral aspect of the base of the tongue in the left retromolar trigone just anterior to the left pterygoid muscle abutting the left angle of the mandible appears non-masslike today compared to the prior exam.Reference right level Ib lymph node is unchanged measuring 9 mm. Right retropharyngeal lymph node abutting the right cervical internal carotid artery is unchanged measuring up to 10 mm. A smaller right level IIb lymph node seen previously measuring up to 8 mm in short axis now measures up to 5 mm in short axis.The right submandibular gland is not well visualized. The imaged brain appears within normal limits. No other areas of suspicious enhancement are identified. Flow-voids in the neck are grossly patent with the exception of the left internal jugular vein flow void which is not well visualized, possibly artifactual.
1.Marked interval decrease in size of right retromolar trigone/base of tongue mass with minimal patchy non-masslike enhancement likely representing post treatment change although residual tumor is not entirely excluded. 2.Marked interval decrease in size of left level II lymph node measuring up to 10 mm today.3.Stable to decreased size of other reference lymph nodes as described above.