Diagnostic performance of ultrasound without any colon preparation for detecting colorectal polyps in pediatric patients

  • Takahiro HosokawaEmail author
  • Mayumi Hosokawa
  • Yutaka Tanami
  • Yumiko Sato
  • Ryosuke Nambu
  • Itaru Iwama
  • Eiji Oguma
  • Yoshitake YamadaEmail author
Original Article



There are limited data on the sensitivity, specificity and accuracy of ultrasound for detecting colorectal polyps in children and young adults.


To evaluate the diagnostic accuracy of ultrasound, without any colon preparation, for detecting colorectal polyps in pediatric patients and to determine the causes of false-negative results.

Materials and methods

We included 74 children with clinical signs like rectal bleeding, abdominal pain or diarrhea who underwent both ultrasound and colonoscopy. We evaluated the diagnostic performance of ultrasound for detecting colorectal polyps before colonoscopy, which served as the reference standard. We used Fisher exact and Student’s t-tests for statistical analyses.


Fifteen pediatric patients were diagnosed with colorectal polyps in the transverse (n=3), descending (n=1) and sigmoid (n=6) colon, and rectum (n=5) by colonoscopy. The sensitivity, specificity and accuracy of ultrasound to detect colorectal polyps were 47% (7/15, 95% confidence interval [CI] 21–73%), 100% (59/59, 95% CI 94–100%) and 89% (66/74, 95% CI 80–95%), respectively. The volume (mean ± standard deviation) of polyps not detected by ultrasound was significantly smaller than that detected (270±380 mm3 vs. 4,600±3,900 mm3, P=0.0124). We observed a significant difference in the location between the polyps detected and not detected by ultrasound (rectal/non-rectal=0/7 vs. 5/3, P=0.0256). No significant age or gender difference was observed.


The accuracy for detecting colorectal polyps by ultrasound was 89% (95% CI, 80–95%) in our cohort. Polyps found in the rectum and relatively smaller polyps accounted for several false-negative cases.


Children Colon Colonoscopy Juvenile polyp Screening Sonography Ultrasound 


Compliance with ethical standards

Conflicts of interest



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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of RadiologySaitama Children’s Medical CenterSaitamaJapan
  2. 2.Department of PediatricsSaitama City HospitalSaitamaJapan
  3. 3.Division of Gastroenterology and HepatologySaitama Children’s Medical CenterSaitamaJapan
  4. 4.Department of RadiologyKeio University School of MedicineTokyoJapan

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