Navigation Links
Amyloid imaging helps in evaluating possible Alzheimer disease
Date:11/27/2012

Philadelphia, Pa. (November 27, 2012) A test to detect brain amyloid deposits associated with Alzheimer disease (AD) provides doctors with useful information on treatment and further testing for patients with cognitive impairment, according to a study published online by the journal Alzheimer Disease & Associated Disorders. The journal is published by Lippincott Williams & Wilkins, a part ofWolters Kluwer Health.

Positron emission tomography (PET) scans using a biomarker called florbetapir F18 can show amyloid plaques in the braina characteristic feature of AD. "Amyloid imaging results altered physicians' diagnostic thinking, intended testing and management of patients undergoing evaluation for cognitive decline," according to the study by Dr Mark Mintun of Avid Pharmaceuticals, Philadelphia, and colleagues.

Is It Alzheimer Disease? Florbetapir Scan Provides Evidence

The researchers designed a "real-world" study to determine how florbetapir would affect clinical management of patients with cognitive impairment. While a florbetapir PET scan showing amyloid plaques doesn't prove that AD is present, it provides a previously unavailable piece of evidence to support the diagnosis.

The study included 229 patients seen by neurologists or other specialists for evaluation of cognitive decline or impairment of uncertain etiology. Before the florbetapir PET scan, doctors provided a provisional diagnosis, an estimate of their diagnostic confidence, and their plans for further testing and treatment. The goal was to assess the value of florbetapir PET in making the final diagnosis and in providing doctors with useful information for clinical decision making.

The florbetapir PET scans showed amyloid deposits in 113 out of 229 patients. The information provided led doctors to change their diagnosis in 55 percent of cases.

When the provisional diagnosis was AD, imaging results led to a change in diagnosis in 37 percent of cases. When the pre-scan diagnosis was either "indeterminate" or another cause of dementia, the diagnosis changed in over 60 percent of cases. In either direction, the scans increased the physicians' ratings of diagnostic confidence by about 20 percent.

Impact on Treatment and Testing Decisions

Florbetapir PET also provided useful information for treatment decision-making: in 87 percent of patients, the results contributed to at least one change in the treatment plan. The main impact was in deciding whether or not to use medications that are helpful in AD. The scan results also affected decisions on further testingin many cases, physicians dropped plans to perform additional brain imaging studies or neuropsychological tests.

Alzheimer disease is the most common cause of dementia, but the diagnosis can be challenging to make. The only definitive way to diagnose AD is by autopsy examination of the brain after death. Up to 20 percent of patients diagnosed with AD turn out not to have had AD on autopsy, while up to 40 percent of patients diagnosed with other causes of dementia have evidence of AD at autopsy.

Florbetapir PET is the first FDA-approved imaging that can estimate amyloid deposits in the brain of a living patient. Previous studies have shown that the scans are accurate in identifying patients later shown to have AD at autopsy.

The new results show that florbetapir PET scans can have a significant effect in "real world" clinical evaluation of patients with cognitive impairment. By strengthening the case for or against a diagnosis of AD, this test can have a significant impact on patient managementparticularly related to the use of AD medications and the need for further testing. Additional studies will be needed to confirm whether "clinical care that includes amyloid imaging will translate into better outcomes" for patients with cognitive impairment and possible AD.


'/>"/>

Contact: Connie Hughes
Connie.Hughes@wolterskluwer.com
646-674-6348
Wolters Kluwer Health
Source:Eurekalert

Related medicine news :

1. BUSM researchers part of multi-center study on cardiac amyloidosis
2. Live imaging shows response to cancer drugs can be boosted by altering tumor microenvironment
3. MR enterography is as good or better than standard imaging exams for pediatric Crohns patients
4. Use of dedicated pediatric imaging departments for pediatric CT reduces radiation dose
5. Low-dose whole-body CT finds disease missed on standard imaging for patients with multiple myeloma
6. Study examines necessity of additional imaging in PET/CT oncologic reports
7. Fox Chase researchers find no disparities in imaging before breast cancer surgery
8. Piramal imaging to present data at Society for Nuclear Medicine Annual Meeting
9. Mount Sinai is first in New York state to perform new Alzheimers imaging test in clinical setting
10. Imaging agents predict breast cancer response to endocrine therapy
11. Noninvasive imaging technique may help kids with heart transplants
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/24/2016)... Diego, CA (PRWEB) , ... June 24, 2016 , ... ... with the American Cancer Society and the Road To Recovery® program to drive cancer ... to seniors and other adults to ensure the highest quality of life and ongoing ...
(Date:6/24/2016)... ... June 24, 2016 , ... People across the U.S. are sharpening their pencils ... an essay contest in which patients and their families pay tribute to a genetic ... 2016 National Society of Genetic Counselors (NSGC) Annual Education Conference (AEC) this September. ...
(Date:6/24/2016)... , ... June 24, 2016 , ... ... is proud to recognize Dr. Barry M. Weintraub as a prominent plastic surgeon ... beautiful women in the world, and the most handsome men, look naturally attractive. ...
(Date:6/24/2016)... ... June 24, 2016 , ... ... the Frederick area economy by obtaining investment capital for emerging technology companies. ... years that have already resulted in more than a million dollars of capital ...
(Date:6/24/2016)... ... June 24, 2016 , ... Venture Construction Group (VCG) sponsors Luke’s ... June 20th at the Woodmont Country Club at 1201 Rockville Pike, Rockville, Maryland, 20852. ... helping service members that have been wounded in battle and their families. Venture Construction ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... , June 23, 2016  Guerbet announced today that ... Supplier Horizon Award . One of ... was recognized for its support of Premier members through ... clinical excellence, and commitment to lower costs. ... this recognition of our outstanding customer service from Premier," ...
(Date:6/23/2016)... Research and Markets has announced the addition ... States, China, Japan, Brazil, United Kingdom, Germany, France, Italy, ... Surgical Procedure Volumes: Global ... surgical procedure volume data in a geographic context. The ... of growth drivers and inhibitors, including world population growth, ...
(Date:6/23/2016)... NEW YORK , June 23, 2016 ... rough waters, but it continues to present great opportunities ... featured companies for today: Intrexon Corp. (NYSE: ... ), Arena Pharmaceuticals Inc. (NASDAQ: ARNA ), ... Learn more about these stocks and receive your complimentary ...
Breaking Medicine Technology: