Study examines benefit of follow-up CT when abdominal ultrasound inconclusive

April 30, 2012

About one-third of CT examinations performed following an inconclusive abdominal ultrasound examination have positive findings, according to a study of 449 patients at Massachusetts General Hospital in Boston.

Opinions vary as to the need and relevance for further diagnostic imaging workup after an inconclusive abdominal , said Supriya Gupta, MD, one of the authors of the study. "Our study found that 32.9% of follow-up CT examinations had positive findings, while 42.7% had findings that were not significant and 11.7% were equivocal. The remaining 12% had incidental findings, that is, important findings but not related to the clinical indication for the exam, said Dr. Gupta.

"While only about 33% of the had positive findings it doesn't mean that the other CT exams were not valuable as sometimes even negative exams add a lot to patient management," noted Dr. Gupta.

The study found that follow-up CT was most useful in diagnosing renal lesions. The positivity rate for CT was 87.5% for renal cysts and 81.8% for renal stone, said Dr. Gupta. Renal cysts and renal stone were two of the more common indications for recommending follow-up CT.

CT had the least value as a follow up exam for indeterminate pancreatic and intestinal masses on ultrasound, with a less than 10% positivity rate" said Dr. Gupta.

The study results emphasize that the benefits of CT as a follow-up to inconclusive ultrasound examinations need to be more carefully reviewed; standardized guidelines for the use of follow-up CT need to be developed because the use of CT has cost and implications, said Dr. Gupta.

The study will be presented on April 30 at the American Roentgen Ray Society Annual Meeting in Vancouver, Canada.

Explore further: Ultrasound first, not CT, for diagnosing suspected acute appendicitis

Related Stories

Recommended for you

Molecularly shutting down cancer cachexia

August 30, 2016

Healthy fat tissue is essential for extended survival in the event of tumor-induced wasting syndrome (cachexia). In Nature Medicine, researchers at Helmholtz Zentrum München show that selective manipulation of an enzyme ...

Radiologists detect breast cancer in 'blink of an eye'

August 29, 2016

A new study by investigators at Brigham and Women's Hospital in collaboration with researchers at the University of York and Leeds in the UK and MD Andersen Cancer Center in Texas puts to the test anecdotes about experienced ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.