35-year-old female with melanoma with brain and lung metastases. Evaluate progression. CT of brain without and with infusion:Enhancing lesion measuring approximately 7 mm times 6 mm in transaxial dimension within the pons is noted. No evidence of surrounding edema. This finding was noted on prior MRI and considering the difference in technique no definitive interval change is detected. Images two posterior fossa otherwise demonstrate no detectable metastatic lesion.Images through supratentorial space demonstrate an area of encephalomalacia along the interhemispheric aspect of right frontal lobe with no abnormal enhancement. This was noted on prior MRI examination at the site of prior craniotomy.A small calcific/hemorrhagic and with possible enhancement in the right posterior temporal adjacent to the trigone of right lateral ventricle measuring 4 mm x 4 mm is consistent with an additional metastatic lesion. This was noted on prior MRI exam and is stable. No definitive detectable additional lesions.Calvarium demonstrates post operative changes of right frontal craniotomy and is otherwise negative. Mastoid air cells and paranasal sinuses are unremarkable.120 cc of Omnipaque 350 was utilized for the above study.
The visualized lesions on this exam are similar to what were noted on the prior MRI examination. CT is significantly less sensitive to detect smaller lesions.