Secondary malignant neoplasm of other parts of nervous system [C79.49] / Malignant (primary) neoplasm, unspecified [C80.1], Reason for Study: ^Reason: 63 yom with h/o cns lymphoma s/p multiple therapies. Now with recent onset of hoarseness and ct scan of describing unilateral vocal cord paralysis. Assess for the evidence of worsening CNS disease. Previously described right ill-defined patchy T2/flair high signal intensity lesion at the right basal ganglia demonstrates interval decrease in its extent and signal intensity since prior scan. The extent of gadolinium enhancement is also decreased since prior scan.Although there are significant motion artifacts, previously seen left optic apparatus enhancement is not as conspicuous than prior scan.There is no other abnormal enhancement on this scan.Right frontal approach Ommaya catheter with the tip position around right side foramen of Monroe is again seen, unchanged since prior scan.There is no evidence of acute ischemic or hemorrhagic lesion.The ventricles, sulci and cisterns are symmetric and unremarkable. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The mastoid air cells are clear. Mucosal thickenings on bilateral ethmoid and maxillary sinuses.
1. Interval decrease of the extent of the right basal ganglia T2/flair high signal intensity lesion as well as the extent of its enhancing portion since prior scan.2. Interval decrease of the extent of enhancement of the left optic apparent since prior scan.3. No evidence of acute ischemic or hemorrhagic lesion. No evidence of new enhancing lesion.