An early and accurate diagnosis of the cause of dementia is important for the following reasons:

• To rule out Alzheimer’s disease and ease the patient’s and family’s concern.
• To identify any treatable condition and initiate treatment as appropriate.
• To identify Alzheimer’s disease at the earliest possible stage; this gives the patient and family time to plan for the future needs and care of the patient. This also allows the patient to start using some medicines that are only useful in the earlier stages of Alzheimer’s.
1. When the brain can be closely examined for certain microscopic changes caused by the disease Alzheimer’s disease cannot be definitely diagnosed until after death,.

2. However, doctors today can diagnose what they refer to as probable Alzheimer’s disease with almost 90% accuracy.through thorough testing and a “process of elimination,”

The following things may be used to help make a diagnosis of Alzheimer’s disease:

• Patient History
• A history from the patient helps the doctor assess a person’s past and current health situation. It also helps the doctor evaluate whether there are any medical problems, develop a plan of treatment, and monitor the patient’s health over time.

During this evaluation, the doctor asks the person a series of questions. A thorough patient history includes:

• Patient’s identifying information.
• Information about the main problem, including any difficulties in daily living.
• Information about other symptoms.
• History of any current illness.
• Past medical history.
• Medications being taken.
• Current health status.
1. Psychosocial history — like marital status, living conditions, employment, sexual history, important life events.
2. Mental state — this is a series of questions that the doctor will ask to determine if the person is experiencing any evidence of psychiatric illness, like depression.
Family history (including any illnesses that seem to run in the family).