Male, 26 years old, with CNS lymphoma on MTR chemotherapy, now with recurrent intermittent headaches. Evidence of a small left parietal craniotomy is seen from prior biopsy. Since prior examinations, large areas of homogeneous enhancement involving the left corpus callosum and cingulate gyrus and the left parieto-occipital junction have resolved. Substantial edema associated with these lesions has also resolved leaving only mild patchy areas of chronic appearing FLAIR hyperintensity.No new pathologic intracranial enhancement is seen. No edema or mass effect is detected. Scattered nonspecific FLAIR hyperintense foci are nonspecific. No evidence of acute intracranial hemorrhage or any abnormal extra-axial fluid collection is seen. Ventricular size and morphology are within normal limits.
1.Interval resolution of enhancing lesions seen previously in the left cerebral hemisphere.2.Edema associated with these lesions has also resolved leaving only mild residual signal abnormality perhaps representing gliosis.3.No new or acute intracranial lesions are detected.