what is the cognitive brain impairment and mild brain atrophy for a patient (62 female) who had elevated liver enzymes and she took drugs to suppress autoimmune hepatitis, Now her liver is ok. First, her liver went up to Fibrosis grade 2 but is now in the Normal stage. Never went higher than Fibrosis grade 2 and never went to Cirosis. But now after about 5 years of not taking liver drugs, she has brain atrophy, short-term memory loss, and a little language difficulty but she does not have any movement problems, or keeping balance problems, or no walking problems. She only has memory loss and language problems. Is it Alzheimer's disease or it is just a Cognitive Impairment due to ammonia deposition and brain atrophy?