Metastatic yolk sac tumor status post chemotherapy and radiation. Follow-up exam. Continued interval treatment response. The high posterior right frontal lesion maintains subtle T2 abnormality, but no enhancement. The posterior left temporal lesion is no longer visualized. Continued interval decrease in size of right posterior medulla lesion which now measures 4 x 3 mm, previously 7 x 6 mm. Previously noted right inferior cerebellar lesion is not visualized. No new abnormal enhancing lesions.Stable persistent foci of susceptibility artifact related to prior lesions. There is no evidence of intracranial hemorrhage. The ventricles and basal cisterns are normal in size and configuration. The expected intracranial vascular flow voids are present.The paranasal sinuses are clear. Complete opacification of the right mastoid air cells. The orbits are unremarkable.
1. Continued interval treatment response with decrease in size of the right medulla lesion. Additional previously noted lesions are no longer identified. No new lesions.2. Complete opacification of the right mastoid air cells which has progressed compared to prior and may reflect eustachian tube dysfunction.