As per medicinenet.com the following would be required to arrive at a complete diagnosis."
1. Patient history - to compare normal aging and dementia related symptoms the caregiver is the best person to provide this information;
2. Physical examination – to rule out other diseases/disorders that can overlap or medication that may be causing dementia like symptoms;
3. Neurological evaluations – to look at balance, reflexes, sensory functions;
4. Laboratory tests – blood tests, urine analysis, toxicology tests etc to rule out treatable causes of the dementia symptoms;
5. Cognitive and neuropsychological tests – language skills, problem solving ability, other abilities required to perform tasks of daily living. A Mini-Mental State Exam (MMSE) assesses cognitive skills in persons suspected with dementia;
6. Brain scans like CT and MRI can confirm the causes of the dementia symptoms and whether they are treatable;
7. Psychiatric evaluation – to determine if the person is suffering from depression or other psychiatric disorder that also has dementia like symptoms."