Featured Research

from universities, journals, and other organizations

Thyroid-cancer Test Reveals Recurrence Early

Date:
July 1, 2005
Source:
Ohio State University
Summary:
A blood test for thyroid cancer can detect persistent or recurrent disease even before doctors can find any trace of a tumor, according to a new study. The findings suggest that people treated for the disease should be examined regularly for early signs of recurrence. The study examined how well a test for thyroid cancer can predict whether the disease will recur.

COLUMBUS , Ohio – A blood test for thyroid cancer can detect persistent or recurrent disease even before doctors can find any trace of a tumor, according to a new study. The findings suggest that people treated for the disease should be examined regularly for early signs of recurrence.

Related Articles


The study, by researchers at The Ohio State University Comprehensive Cancer Center – Arthur G. James Cancer Hospital and Richard J. Solove Research Institute (OSU CCC – James), examined how well a test for thyroid cancer can predict whether the disease will recur.

The findings were published June 21 online in the Journal of Clinical Endocrinology & Metabolism.

The test measures a protein known as thyroglobulin (Tg), which is made by thyroid-cancer cells. The measurement is taken after a person is injected with a relatively new drug known as thyrotropin alfa, or Thyrogen. The drug allows Tg testing without the sometimes debilitating side effects of hypothyroidism that otherwise accompany the test when stimulation testing is done.

“We were surprised to find that even with relatively low thyroglobulin levels, and even when there is no sign of a tumor, about 80 percent of patients had a recurrence of their cancer within three to five years,” says first author Richard T. Kloos, associate professor of internal medicine and of radiology.

“This indicates that we are detecting these tumors very early, and that time and diligence may be needed to find them.”

The study also found that even when Tg levels are very low or undetectable, about 2 to 5 percent of patients still have a recurrence after three to five years.

“Currently, some thyroid-cancer treatment guidelines say that these patients may never need further testing, but our data contradict that,” says Kloos, co-director of the Thyroid Cancer Unit at the OSU CCC – James.

Thyroid cancer is usually treated surgically by removing the thyroid gland, followed by drinking radioactive iodine to kill any remaining cancer cells. Patients must then take synthetic thyroid hormone for life.

With all thyroid cells eliminated, the Tg level should be zero, and its presence later signals a possible return of the disease. (Sometimes, however, low levels of Tg can be present following treatment, and slowly decline over time.)

In the past, Tg testing required that patients stop taking their synthetic thyroid hormone several weeks before the test.

“That worked fairly well, except that some people became miserable after they stopped taking their synthetic thyroid hormone and became hypothyroid,” Kloos says. “Some patients claimed that they'd rather die of their disease than go through that regularly.”

Withdrawing from thyroid hormone can cause fatigue, weight gain, constipation, mental dullness, lethargy, depression and other symptoms.

Thyrogen, approved for use in 1998, allowed people to have a stimulated Tg test and continue taking the synthetic hormone.

The present study sought to help interpret the results of the Thyrogen-assisted Tg test. It involved 107 patients (88 women and 19 men; average age 36 years) treated for papillary, follicular or Hurthle cell thyroid cancer. Following surgery and radioactive iodine treatment, the patients were injected with Thyrogen and tested for Tg levels between January 1999 and March 2001.

The patients were divided into three groups based on their Tg reading. Group 1 patients had Tg levels below 0.5, group 2 had Tg levels of 0.6 to 2.0, and Group 3 had Tg levels greater than 2.0. (The numbers represent nanograms of Tg per milliliter of blood serum.)

After three to five years, the researchers found recurrent tumors in about 80 percent of the patients with Tg levels above 2.0, and in about 2 percent of those with Tg levels below 0.5.

An estimated 25,690 new cases of thyroid cancer are expected in 2005, with 19,190 of those expected to occur in women; 1,490 people are expected to die of the disease. In addition, about 330,000 living Americans have been treated for thyroid cancer, about 20 percent of whom are likely to have a recurrence.

Ernest L. Mazzaferri, OSU emeritus professor and chairman of medicine, was a co-author of the study.

###

Editors note: Kloos and Mazzaferri are on the speakers bureau for Genzyme Corp., the maker of Thyrogen. They hold no stock and currently receive no research support from the company.


Story Source:

The above story is based on materials provided by Ohio State University. Note: Materials may be edited for content and length.


Cite This Page:

Ohio State University. "Thyroid-cancer Test Reveals Recurrence Early." ScienceDaily. ScienceDaily, 1 July 2005. <www.sciencedaily.com/releases/2005/07/050701063131.htm>.
Ohio State University. (2005, July 1). Thyroid-cancer Test Reveals Recurrence Early. ScienceDaily. Retrieved November 23, 2014 from www.sciencedaily.com/releases/2005/07/050701063131.htm
Ohio State University. "Thyroid-cancer Test Reveals Recurrence Early." ScienceDaily. www.sciencedaily.com/releases/2005/07/050701063131.htm (accessed November 23, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Sunday, November 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola-Hit Sierra Leone's Late Cocoa Leaves Bitter Taste

Ebola-Hit Sierra Leone's Late Cocoa Leaves Bitter Taste

AFP (Nov. 23, 2014) The arable district of Kenema in Sierra Leone -- at the centre of the Ebola outbreak in May -- has been under quarantine for three months as the cocoa harvest comes in. Duration: 01:32 Video provided by AFP
Powered by NewsLook.com
Don't Fall For Flu Shot Myths

Don't Fall For Flu Shot Myths

Newsy (Nov. 23, 2014) Misconceptions abound when it comes to your annual flu shot. Medical experts say most people older than 6 months should get the shot. Video provided by Newsy
Powered by NewsLook.com
WFP: Ebola Risks Heightened Among Women Throughout Africa

WFP: Ebola Risks Heightened Among Women Throughout Africa

AFP (Nov. 21, 2014) Having children has always been a frightening prospect in Sierra Leone, the world's most dangerous place to give birth, but Ebola has presented an alarming new threat for expectant mothers. Duration: 00:37 Video provided by AFP
Powered by NewsLook.com
Could Your Genes Be The Reason You're Single?

Could Your Genes Be The Reason You're Single?

Newsy (Nov. 21, 2014) Researchers in Beijing discovered a gene called 5-HTA1, and carriers are reportedly 20 percent more likely to be single. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins