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Retroperitoneal malignant mesenchymoma: imaging findings in five cases

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Abstract.

Background: To describe computed tomographic (CT), magnetic resonance (MR), ultrasonographic (US), and angiographic findings of retroperitoneal malignant mesenchymoma with emphasis on CT findings.

Methods: Five CT, four US, four angiography, and two MR studies were obtained in five patients with pathologically proven retroperitoneal malignant mesenchymoma.

Results: Tumors were larger than 10 cm (n = 4), well-cimcumscribed and heterogeneous (n = 4), and with massive intratumorous calcifications (n = 3) on plain CT or US. Tumors showed heterogeneous enhancement on contrast-enhanced CT scans (n = 4) and moderate hypervascularity with heterogeneous staining on angiography (n = 3). Tumors were essentially hypointense on T1-weighted MR images (n = 2) and heterogeneous hyperintense on T2-weighted MR images (n = 2). Plain CT showed a fat-dense structure in a tumor in one patient.

Conclusions: The radiologic findings of large expansile heterogeneous masses in the retroperitoneum, especially with massive calcifications, were considered to be typical of malignant mesenchymomas. RID=""ID=""<e5>Correspondence to:</e5> S. Suzuki

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Received: 5 May 1997/Accepted after revision: 23 July 1997

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Suzuki, S., Furui, S., Kokubo, T. et al. Retroperitoneal malignant mesenchymoma: imaging findings in five cases. Abdom Imaging 24, 92–97 (1999). https://doi.org/10.1007/s002619900449

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  • DOI: https://doi.org/10.1007/s002619900449

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