This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Organic Mental Disorders, Subject name: Psychiatry
All the following are features of Alzheimer's disease except: 
Select and explain. 
A. Cerebellar atrophy, B. Common in 5th and 6th decade, C. Atrophied gyri widened sulci, D. Progressive dementia
A: Cerebellar atrophy
Answer: A: Cerebellar atrophy 
Explanation: In Alzheimer's, the disease process usually spares cerebellum. Especially neurofibrillary tangles are never seen in cerebellum. Alzheimer's D/s (Dementia of Alzheimer type) Pathophysiological Findings: Diffuse atrophy, Flattened Coical Sulci & Dilated Cerebral ventricles Primarily involve Parietal and temporal Lobes Atrophy stas In Medical Temporal Lobe (Entorhinal/Perirhinal Coex & Hippocampus) and spreads to Lateral & Medial parietal Lobes, Lateral Temporal Lobes & Lateral Frontal Coex