<prompt> All the following are featuring Alzheimers disease except-Cerebellar atrophyCommon in 5th and 6th decadeAtrophied gyri and widened sulciProgressive dementia  <response>: Cerebellar atrophy is seen in subcortical dementia, therefore, it is not a feature of Alzheimers disease as it is a cortical type of dementia.Pathology in Alzheimers diseaseGross:- Atrophy of gyri, widening of sulci, enlarged ventricles.Microscopy :- Senile plaque, neurofibrillary tangles, neuronal loss, synaptic loss, granulovascular degeneration. 