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Extrarenal Wilms' tumour

K Suzuki1, H Miyake, M Tashiro

  • 1Department of Radiology, Oita Medical University, Japan.

Pediatric Radiology
|January 1, 1993
PubMed
Summary
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Extrarenal Wilms' tumour, a rare condition, presents unique imaging characteristics. This case highlights the diagnostic features of this rare kidney cancer variant in a young child.

Area of Science:

  • Pediatric Oncology
  • Diagnostic Imaging
  • Surgical Pathology

Background:

  • Extrarenal Wilms' tumour (EWT) is an exceptionally rare malignancy, often presenting diagnostic challenges due to limited literature on its imaging features.
  • Early and accurate diagnosis is crucial for effective management of pediatric cancers.

Observation:

  • A 2-year-old boy presented with a palpable firm mass in the right flank.
  • Imaging studies including computed tomography (CT), magnetic resonance imaging (MRI), and ultrasonography revealed a heterogeneous solid retroperitoneal mass distinct from the right kidney.

Findings:

  • Angiography demonstrated an enlarged right gonadal artery supplying the tumour.
  • The tumour exhibited irregular, tortuous vascularity, described as a "spider leg" or "creeping vine" pattern, characteristic of Wilms' tumour.

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  • Histopathological examination definitively confirmed the diagnosis of extrarenal Wilms' tumour.

    • Implications:

    • This case underscores the importance of considering EWT in the differential diagnosis of pediatric retroperitoneal masses.
    • Characteristic imaging findings, particularly vascular patterns, can aid in preoperative diagnosis.
    • Further case reports and studies are needed to better define the imaging spectrum and management strategies for EWT.