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[Liver metastasis from carcinoid: diagnostic imaging]

M De Santis1, D Santini, S Alborino

  • 1Istituto di Radiologia dell'Università, Modena.

La Radiologia Medica
|November 1, 1996
PubMed
Summary

Diagnostic imaging reveals characteristic patterns for carcinoid liver metastases. While CT and MRI show hypervascularity, no single technique predicts metastasis nature, necessitating a multimodal approach.

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Area of Science:

  • Radiology
  • Oncology
  • Hepatology

Background:

  • Carcinoid tumors frequently metastasize to the liver.
  • Accurate imaging is crucial for diagnosis and treatment planning.

Purpose of the Study:

  • To describe the diagnostic imaging patterns of carcinoid liver metastases.
  • To evaluate the utility of various imaging modalities in assessing liver involvement.

Main Methods:

  • Six patients with histologically confirmed carcinoid liver metastases underwent ultrasonography (US), CT, MRI, and Digital Subtraction Angiography (DSA).
  • All patients received transcatheter embolization for liver metastases.

Main Results:

  • Imaging revealed multiple metastases (0.5-14 cm) with varied echogenicity on US, hypodensity on precontrast CT, and hyperdensity in the arterial phase on contrast-enhanced CT.

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  • MRI showed hypointensity on T1 and hyperintensity on T2-weighted images.
  • DSA demonstrated tumor neovascularization and hypervascular patterns, with portal vein displacement but no infiltration.

    • Conclusions:

    • Multimodal imaging (US, CT, MRI, DSA) effectively assesses liver involvement by carcinoid metastases.
    • CT and MRI highlight hypervascularity, but cannot predict metastasis nature.
    • DSA is essential for pre-embolization planning.