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Too Many Unnecessary Thyroid Biopsies Performed, Experts Say

Too Many Unnecessary Thyroid Biopsies Performed, Experts Say

08/26/13

MONDAY, Aug. 26 (HealthDay News) -- Many Americans are undergoing needless thyroid biopsies, researchers say, and simplifying clinical guidelines would go a long way toward curbing the problem.

The investigators from University of California, San Francisco analyzed the medical records of about 8,800 patients who underwent thyroid ultrasound scans. Reporting in the Aug. 26 online issue of JAMA Internal Medicine, they said that more than 98 percent of the thyroid nodules found in patients were not cancerous.

"Right now, we're doing far too many thyroid biopsies in patients who are really at very low risk of having thyroid cancer," study lead author Dr. Rebecca Smith-Bindman, a professor in the department of radiology and biomedical imaging, said in a UCSF news release.

Based on the finding, her team is recommending that biopsies should be performed only when medical imaging reveals a thyroid nodule with tiny flecks of calcium, known as microcalcifications, or a nodule that is more than 2 centimeters in diameter and completely solid.

Patients with any other findings have too low a cancer risk to require biopsy or continued surveillance, the researchers said .

"Compared with other existing guidelines, many of which are complicated to apply, following these simple, evidence-based guidelines would substantially decrease the number of unnecessary thyroid biopsies in the United States," Smith-Bindman said.

She noted that the procedures are discomforting, cause worry for patients, and require time off from work and other activities. "Plus, they are often inconclusive. And that can lead us down the path of open surgical biopsy, which is hardly trivial, and quite risky in itself, even in patients without cancer," Smith-Bindman said.

Other experts agreed with the need to rein in thyroid biopsies.

"Due to the high prevalence of thyroid nodules in the United States population, the increase of incidental detection of these nodules, the demand for higher cost-efficiency, and the avoidance of unnecessary invasive procedures, it is crucial that we begin to limit the number of fine-needle biopsies of these lesions," said Dr. David Hiltzik, director of otolaryngology and head & neck surgery at Staten Island University Hospital in New York City.

Hiltzik believes the new study will help doctors "risk stratify each patient and to help decide which patients should and should not be biopsied."

"Any cancer diagnosis has a psychological impact," Hiltzik added. "However, in light of the fact that the majority of thyroid cancer has a high survival rate, we must become more judicious in our diagnosis of this disease."

Another expert in thyroid care concurred, and added that there may be better, noninvasive means of determining whether a thyroid growth poses a health risk.

"The majority of thyroid nodules, particularly in women, are benign," explained Dr. Eric Genden, chair of otolaryngology at Mount Sinai Medical Center in New York City. "Although current techniques to assess a nodule for malignancy rely on cystology (viewing a sample of cells under a microscope), new techniques using molecular testing have the potential to decrease the risk of unnecessary surgery."

About 15,000 men and 45,000 women in the United States will be diagnosed with thyroid cancer this year and 1,850 people will die of it, according to the U.S. National Cancer Institute.

More information

The American Cancer Society has more about thyroid cancer.

Copyright © 2013 HealthDay. All rights reserved.

Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.

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