J Korean Soc Radiol.  2014 May;70(5):363-368. 10.3348/jksr.2014.70.5.363.

Evaluation of the Accuracy of Abdominal Ultrasound Focusing on the Missed Lesions Based on the Abdominal Computed Tomography in Health Screening

• Jang YS
• Park NH
• Park CS
• Seong SO

• KMID: 1941783
• DOI: http://doi.org/10.3348/jksr.2014.70.5.363

Abstract

PURPOSE
To evaluate the accuracy of abdominal ultrasonography (US), and the incidence, size and types of lesions, easily missed on abdominal US in health screening.
MATERIALS AND METHODS
We retrospectively enrolled 311 physical checkup patients (male-to-female ratio, 156:155; mean age, 53.1 years), who underwent screening abdominal US and abdominal computed tomography (CT) on same day from July, 2011 to October, 2013. Per-organ and per-lesion analyses and verification of size and location of renal and hepatic lesions which were frequently missed on abdominal US were performed.
RESULTS
Overall, 209 additional lesions were found on abdominal CT in 140 physical checkup patients and the missing rate of the lesion was 45%. Renal lesions were most common (105 lesions), followed by hepatic lesions (91 lesions). In renal and hepatic lesions which were missed on abdominal US, most (93.4%, 93.5%) lesions were less than 1.5 cm in longitudinal diameter. Most of missed renal lesions were located in mid portion of left kidney (24.7%). Most of the missed hepatic lesions on US were located in the hepatic dome (segment 7, 8, 2) (66%).
CONCLUSION
An awareness of the prevalence and location of easily missed lesions on screening abdominal US is helpful to enhance diagnostic performance of abdominal US in physical checkup patients.

MeSH Terms

Humans
Incidence
Kidney
Mass Screening*
Prevalence
Retrospective Studies
Tomography, X-Ray Computed
Ultrasonography*

Figure

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  Fig. 1 A 65-year-old male with adrenal adenoma in right adrenal gland (arrow), that was not found on abdominal ultrasonography, though it could be detected on contrast enhanced abdominal CT.

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  Fig. 2 A 42-year-old female with renal stone. A. Ultrasonography shows no abnormal finding in right kidney. B. There is a tiny right renal stone (arrow), that was not found on ultrasonography, in lower pole on contrast enhanced abdominal CT.

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  Fig. 3 A 50-year-old male with tiny hepatic cyst with peripheral calcification (arrow) in S8 of the liver, that was not found on abdominal ultrasonography.

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  Fig. 4 A 39-year-old female with hepatic hemangioma which was not detected on ultrasonography. Poral phase CT shows a centripetal enhancing lesion (arrow) in S8 of the liver. The size of the lesion is 2.3 cm and the lesion was regarded as hemangioma.

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