Hello, I am an RN with some unfortunate diagnostic information. eg..microvascular encephalopathy,minimal. COGNITIVE IMPAIRMENT, PRIMARY, CONSISTENT WITH DEPRESSION. aN OCTREOSCAN REVEALED A BRAIN STEM TUMOR, ADENOMA VS CA. hOWEVER, THE SUBSEQUENT MRI DI NOT SHOW EVIDENCE OF THE TUMOR. i CAN NOT REMBER IF CONTRAST WAS USED. i HAVE NUMEROUS t2 HYPERDENSITIES IN THE WHITE MATTER, PROBABLE SMALL VESSEL ISCHEMIC DISEASE VS A DEMYELINATING PROCESS. tHE csf DID NOT REVEAL OLIGODENDRICYTES. i HAVE b12 DEFICIENCY WITH HIGH LEVELS OF METHYL MALONIC ACID.