Is intraoperative ultrasound (IOUS) still useful for the detection of liver metastases?

M. D'Onofrio, A. Gallotti, E. Martone, L. Nicoli, S. Mautone, A. Ruzzenente, R. Pozzi Mucelli

Research output: Contribution to journalArticlepeer-review


Purpose: To evaluate the clinical impact of intraoperative ultrasound (IOUS) in the detection of liver metastases during the years, as compared with those of other imaging modalities. Materials and methods: All IOUS scans performed for detection of liver metastases from 2000 to 2006 were retrospectively reviewed and compared with the results of preoperative imaging modalities: Ultrasound (US), Computed Tomography (CT), and/or Magnetic Resonance (MR). The number of cases in which IOUS and preoperative imaging studies produced discordant results, in terms of presence/absence of focal liver lesions, was calculated per year. Statistical analysis was performed using the McNemar test. A p value <0.05 was considered statistically significant. Results: Eighty-three IOUS scans performed in 2000-2003 were reviewed, and discordance with preoperative imaging findings was found in 19/83 (23%) cases. Of the 42 IOUS scans done during the 2004-2006 period, 10/42 (24%) showed discordance with preoperative studies. All metastases diagnosed with imaging studies were pathologically confirmed. The number of discordant cases in the two periods were not significantly different (p = 0.2). Conclusion: IOUS is still useful in the detection of liver metastases. Its decreased use is probably due to the improved accuracy of preoperative imaging modalities.

Original languageEnglish
Pages (from-to)144-147
Number of pages4
JournalJournal of Ultrasound
Issue number4
Publication statusPublished - Dec 2009


  • Computed tomography
  • Intraoperative ultrasound
  • Liver
  • Magnetic resonance
  • Metastases
  • Ultrasound

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Internal Medicine


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