Navigation Links
Data reaffirms test's ability to identify benign thyroid nodules
Date:10/24/2013

Aurora, CO (Oct. 23, 2013) The latest study co-led by a CU School of Medicine researcher has confirmed that a Gene Expression Classifier (GEC) test can drastically reduce the problem of unnecessary surgeries in thyroid nodule assessment. These indeterminate nodules are being evaluated with a new molecular diagnostic test that measures the expression levels of 142 genes. This test is able to identify which initially indeterminate nodules are highly likely to be benign, and thus allows patients to avoid unnecessary diagnostic surgery.

This multi-site study co-led by Bryan R. Haugen, MD, professor of medicine and pathology at the University of Colorado School of Medicine provides the first long-term look at how these patients fared, and its findings reaffirm the performance of the Afirma Gene Expression Classifier (GEC). Haugen said "Each year, tens of thousands of patients with thyroid nodules have surgery to remove all or part of their thyroids. This is due to fine needle aspiration (FNA) cell test results that are indeterminate or inconclusive yet raise suspicions for thyroid cancer. Often times, most of these nodules prove to be benign. Our findings suggest that when the GEC identifies an otherwise indeterminate thyroid nodule as benign which it does about 50% of the time it is comparable in accuracy to a benign diagnosis by cytopathology, This fact and the degree to which physicians and patients in the study opted against surgery when the molecular test result was benign underscore the test's potential to drastically reduce the problem of unnecessary surgeries in thyroid nodule assessment."

Researchers analyzed all patients who had received Afirma GEC testing following indeterminate FNA biopsy results at five academic medical centers between 2010 and 2013. The GEC identified 174 of 339 (51%) indeterminate nodules as benign and, among these, 71 had documented clinical follow-up for an average of 9 months. Of these, only one nodule proved cancerous, demonstrating a very high negative predictive value (NPV) for the GEC. This finding is consistent with results from an earlier prospective, multicenter clinical study. Additionally, in the new study only 6% of patients with nodules identified as benign by the GEC test underwent surgery. This is a substantial reduction compared to traditional surgical rates for patients with cytologically indeterminate thyroid nodules.

Thyroid nodules are common, but only approximately 5-15% prove malignant. Most nodules are evaluated using FNA, with approximately 525,000 thyroid nodule FNAs performed in the U.S. in 2011 to rule out cancer. In most cases, the results are benign, yet in approximately 15-30% of cases the results are indeterminate not clearly benign or malignant. Because of the risk of thyroid cancer, most of these patients have historically been recommended for surgery to remove all or part of the thyroid to obtain a final diagnosis. However, such indeterminate nodules prove ultimately benign in 70-80% of cases. For these patients, the surgery was not needed and they were unnecessarily exposed to the cost, risk and morbidity of this intervention. Additionally, most patients subsequently require lifelong thyroid hormone therapy.

The study is published online in the Journal of Clinical Endocrinology & Metabolism and its findings were presented recently at the 83rd Annual Meeting of the American Thyroid Association, held in Puerto Rico.

The long-term findings built on the previous study which demonstrates the Afirma Gene Expression Classifier's accuracy was published in the New England Journal of Medicine.


'/>"/>

Contact: Jackie Brinkman
jackie.brinkman@ucdenver.edu
303-724-1525
University of Colorado Denver
Source:Eurekalert

Related medicine news :

1. ASTRO Chairman Michael Steinberg, M.D., FASTRO, reaffirms Societys commitment to ending self-referral
2. Passages Malibu Reaffirms Its Unshakable Commitment to Total Client Privacy
3. Pozzuolo Rodden, P.C., Philadelphia Business Planning Attorneys, Announce the Release of "IRS Reaffirms Its Commitment To Expand The Audits Of High Net Worth Individuals"
4. Tests in mice identify compound that may keep survivors of brain aneurysms from succumbing to stroke
5. Intact America Protests Good Samaritan’s Experimentation On Healthy Baby Boys
6. 2 tests in combination can provide better asthma diagnosis
7. Best Proxy Site for Video Streaming Goes to idcloak Following Speed Tests
8. PRISM Showcase Premiere on FX Network, Exclusive Content and Contests on EICnetwork.tv
9. Breath tests could be used to diagnose lung cancer
10. Rapid diagnostic tests decrease waiting time for drug-resistant TB patients
11. Cellucor Kicks Off the P6 Blitz with Contests and Giveaways All September Long
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... ... 2016 , ... PawPaws brand pet supplements owned by Whole Health ... the health of felines. The formula is all-natural and is made from Chinese herbs ... Cat Kidney Support Supplement Soft Chews are Astragalus Root Extract and Rehmannia ...
(Date:6/25/2016)... ... 25, 2016 , ... The temporary closing of Bruton Memorial Library on June 21 due to ... a new, often overlooked aspect of head lice: the parasite’s ability to live away from ... common occurrence, but a necessary one in the event that lice have simply gotten out ...
(Date:6/25/2016)... ... ... Friday, June 10, Van Mitchell, Secretary of the Maryland Department of Health and Mental ... exemplary accomplishments in worksite health promotion. , The Wellness at Work Awards took place ... BWI Marriott in Linthicum Heights. iHire was one of 42 businesses to receive an ...
(Date:6/24/2016)... ... ... crisis. Her son James, eight, was out of control. Prone to extreme mood shifts and ... him, he couldn’t control his emotions,” remembers Marcy. “If there was a knife on ... say he was going to kill them. If we were driving on the freeway, ...
(Date:6/24/2016)... ... ... BioMedics, Inc, makers of Topricin and MyPainAway Pain Relief Products, join The ‘Business for a ... an hour by 2020 and then adjusting it yearly to increase at the same rate ... assure the wage floor does not erode again, and make future increases more predictable. , ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... 23, 2016  Astellas today announced the establishment of Astellas Farma Colombia (AFC), a new affiliate with operations headquartered ... Latin America . ... ... ... ...
(Date:6/23/2016)... 2016  Guerbet announced today that it has been ... Award . One of 12 suppliers to ... its support of Premier members through exceptional local customer ... commitment to lower costs. ... our outstanding customer service from Premier," says Massimo ...
(Date:6/23/2016)... Research and Markets has announced ... Analysis (United States, China, Japan, Brazil, United Kingdom, Germany, ... offering. Surgical Procedure ... planners, provides surgical procedure volume data in a geographic ... in-depth analysis of growth drivers and inhibitors, including world ...
Breaking Medicine Technology: