Male, 57 years old, with lung cancer and metastasis to the brain, evaluate for progression. A 3 mm enhancing focus within the right frontal lobe (image 81 series 1201) shows no significant interval change from the prior examination. No significant associated edema is seen.No other areas of pathologic enhancement, focal edema or mass effect are detected. No intracranial hemorrhage or any abnormal extra axial fluid collection is observed. Patchy ill-defined periventricular white matter hypoattenuation has progressed from the prior examination. The ventricles are stable and normal in size.A focus of enhancement within the right parietal bone just off midline is unchanged and nonspecific.
There has been no significant interval change. A very small focus of residual enhancement is unchanged in the right frontal lobe. No new intracranial lesions are suspected. Progression of ill-defined periventricular signal abnormality likely represents a treatment related effect.