Korean Journal of Radiology

The Korean Society of Radiology (대한영상의학회)
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CT Findings of Gallbladder Metastases: Emphasis on Differences According to Primary Tumors

  • Choi, Won Seok (Department of Radiology, Seoul National University Hospital) ;
  • Kim, Se Hyung (Department of Radiology, Seoul National University Hospital) ;
  • Lee, Eun Sun (Department of Radiology, Seoul National University Hospital) ;
  • Lee, Kyoung-Bun (Department of Pathology, Seoul National University Hospital) ;
  • Yoon, Won Jae (Department of Internal Medicine, Inje University Seoul Paik Hospital, Inje University College of Medicine) ;
  • Shin, Cheong-Il (Department of Radiology, Seoul National University Hospital) ;
  • Han, Joon Koo (Department of Radiology, Seoul National University Hospital)
  • Received : 2013.11.11
  • Accepted : 2014.03.15
  • Published : 2014.06.01
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Abstract

Objective: To describe computed tomography (CT) features of metastatic gallbladder (GB) tumors (MGTs) from various primary tumors and to determine whether there are differential imaging features of MGTs according to different primary tumors. Materials and Methods: Twenty-one patients who had pathologically confirmed MGTs and underwent CT were retrospectively enrolled. Clinical findings including presenting symptoms, type of surgery, and interval between primary and metastatic tumors were recorded. Histologic features of primary tumor and MGTs including depth of invasion were also reviewed. Imaging findings were analyzed for the location and morphology of MGTs, pattern and degree of enhancement, depth of invasion, presence of intact overlying mucosa, and concordance between imaging features of primary and metastatic tumors. Significant differences between the histologies of MGTs and imaging features were determined. Results: The most common primary tumor metastasized to the GB was gastric cancer (n = 8), followed by renal cell carcinoma (n = 4) and hepatocellular carcinoma (n = 3). All MGTs (n = 21) manifested as infiltrative wall thickenings (n = 15) or as polypoid lesions (n = 6) on CT, similar to the features of primary GB cancers. There were significant differences in the morphology of MGTs, enhancement pattern, enhancement degree, and depth of invasion according to the histology of primary tumors (p < 0.05). Metastatic adenocarcinomas of the GB manifested as infiltrative and persistently enhancing wall thickenings, while non-adenocarcinomatous metastases usually manifested as polypoid lesions with early wash-in and wash-out. Conclusion: Although CT findings of MGTs are similar to those of primary GB cancer, they are significantly different between the various histologies of primary tumors.

Keywords

Acknowledgement

Supported by : Seoul National University Hospital

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