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Pseudomyxoma peritonei: some different sonographic findings

Yanhong Que1, Chunmei Tao, Xuemei Wang

  • 1Department of Ultrasound, First Affiliated Hospital of China Medical University, Shenyang, 110001, Liaoning, China. quebaobao@yahoo.com.cn

Abdominal Imaging
|January 12, 2012
PubMed
Abstract

Insights

High-frequency ultrasound reveals anechoic areas in the peritoneum, a specific sign for diagnosing pseudomyxoma peritonei (PMP). Mobile echogenic foci in ascites and specific liver margin changes also aid in PMP diagnosis.

Area of Science:

  • Radiology
  • Oncology
  • Gastroenterology

Background:

  • Pseudomyxoma peritonei (PMP) is a rare malignancy characterized by mucinous ascites.
  • Accurate sonographic diagnosis of PMP is crucial for timely management.

Purpose of the Study:

  • To evaluate the sonographic characteristics of PMP.
  • To identify specific ultrasound features indicative of PMP.

Main Methods:

  • Retrospective review of peritoneal biopsies guided by ultrasound.
  • Comparison of sonographic features in 19 PMP cases versus 279 other peritoneal lesions.
  • Analysis of peritoneum, ascites, and parenchymal organ sonograms.

Main Results:

  • Anechoic areas in the peritoneum were observed in 89.5% of PMP cases, with 100% sensitivity.
  • Mobile echogenic foci in ascites were present in 52.6% of PMP cases.
  • High specificity for "starburst" appearance (82.3%) and liver margin scalloping (88.1%) was noted, though sensitivity varied.

Conclusions:

  • Anechoic areas in thickened peritoneum are a specific sonographic sign for PMP.
  • High-frequency transducers enhance visualization of these anechoic areas.
  • Mobile echogenic foci in ascites, "starburst" appearance, and liver margin scalloping are significant indicators of PMP.

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