History of thyroid cancer. Post treatment. Head CT:There is no evidence of intra-axial mass, hemorrhage or infarction. Neck CT:Post-treatment changes are again present at the right masticator space, and parotid space. There is no evidence of interval change of the soft tissues in the surgical bed.An enhancing lesion at the greater wing of right sphenoid bone is again seen, with extension into the orbit. Accounting for differences in imaging techniques, there is no evidence of significant change compared to the more recent MRI study of 3/19/2010. On the CT study, the lesion measures approximately 1.7 x 2 cm on axial plane compared to prior measurement of approximately 2.1 x 2.1-cm on the prior MRI study.There is a heterogeneous nodule in the posterior aspect of the right thyroid lobe, measuring 9 x 9 mm, compared to previous CT measurement of 9 x 8 mm.There is a slightly prominent lymph node at the level 1A region which is still within normal limits in size. There is no evidence of interval change. It demonstrate slightly increased enhancement compared to prior study, but this can be secondary to technical factors. No evidence of adenopathy is seen based on radiological criteria.A developmental venous anomaly is seen in the right cerebellum.There are degenerative changes in the cervical spine. There are numerous nodules in the lungs, consistent with metastatic lung disease.
1. Metastatic lesion involving right sphenoid bone, with no significant interval change. 2 Stable small lymph nodes in the neck. No evidence of pathological adenopathy.3. Unchanged small right thyroid nodule is nonspecific in imaging appearance but may represent the thyroid cancer as per clinical history.4. Numerous pulmonary metastasis. Please correlate with CT chest.