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Mesenteric cyst: sonographic findings
1First Department of Internal Medicine, Akita University School of Medicine, Japan.
Background:
Mesenteric cyst (MC) is a relatively rare disease, and its sonographic characteristics have not been sufficiently analyzed.
Methods:
We studied the sonographic findings of eight patients with MC, with attention paid to its size, shape, internal echoes, and especially the presence or absence of lateral shadowing and the mode of back echoes. In four cases, the sound velocity and acoustic impedance of cystic fluid were also measured. The mode of blood flow was evaluated by color Doppler sonography.
Results:
Six cases showed an oval or comma-shaped mass. Internal echoes were present in six cases, and two of them showed a pseudosolid pattern. In these cases, M-mode sonography confirmed the movement of these internal echoes. Only one case showed a posterior echo enhancement, and no case showed lateral shadowing. Sound velocity measured in four cases was 1,515-1,537 m/s, with an acoustic impedance of 1.550-1.576 kg/m2/s. No blood flow signals were obtained from the lesion.
Conclusion:
MC exhibits so many patterns on ultrasound that we should consider the possibility of MC when encountering an avascular oval mesenteric mass.
Insights
Mesenteric cysts (MC) present diverse ultrasound appearances. Consider MC in avascular oval masses, as sonographic features vary significantly.
Area of Science:
- Medical Imaging
- Gastroenterology
- Diagnostic Ultrasound
Background:
- Mesenteric cysts (MC) are uncommon abdominal masses.
- Sonographic characteristics of MC require further detailed analysis.
Purpose of the Study:
- To analyze the sonographic features of mesenteric cysts.
- To identify key ultrasound findings for diagnosing MC.
Main Methods:
- Retrospective study of eight MC patients.
- Detailed sonographic evaluation including size, shape, echoes, shadowing, and back echoes.
- Measurement of cystic fluid properties and assessment of blood flow via Doppler.
Main Results:
- Six MCs were oval or comma-shaped.
- Internal echoes, sometimes pseudosolid, were observed in six cases.
- No lateral shadowing was detected; posterior echo enhancement occurred in one case. Fluid properties and lack of blood flow were noted.
Conclusions:
- Mesenteric cysts display varied ultrasound patterns.
- The possibility of MC should be considered for avascular oval mesenteric masses.