Clinical question: History of lung cancer, compare to prior exam and provide measurements. Signs and symptoms: None. Pre-and post-enhanced brain MRI:No diffusion weighted abnormalities.Examination demonstrates significant interval improvement of metastatic lesions of cerebral and cerebellar hemispheres since prior exam.Several of the very small infra and supratentorial lesions are no longer detected.There is a tiny 2.5-mm metastatic lesion in the superior aspect of right cerebellar which has decreased in size from prior study measurement of approximately 4.4 mm. The other in cerebellar metastatic lesions are no longer detected.There is age remaining left basal ganglia enhancing metastatic lesion measuring 2.4-mm compared to prior density measurements of 9.9-mm.There is a left posterior temporal 1 mm focus of enhancing metastatic tumor which has decreased in size since prior study measurement of 5.3 mm.A right frontal enhancing metastatic lesion measuring 2.4-mm compared to prior study measurement of 6.8. Several additional small previously noted metastatic lesions are cerebral hemispheres are no longer identified.Stable nonspecific patchy foci of flair hyperintensity (left greater than right) could represent chronic small vessel ischemic strokes and likely with overlapping post treatment/radiation change. Ventricular system remains stable in size and maintained midline.
1.Significant interval improvement of metastatic disease since prior exam.2.Several of the smaller previously known supratentorial and infratentorial metastatic lesions are no longer visible on this study.3.Few remaining metastatic lesions all demonstrate interval decreased size as detailed/measured above.