Coincidental Occurrence of Hepatocellular Carcinoma and Cholangiocarcinoma (Collision Tumors) After Liver Transplantation: A Case Report

AUTHORS

Waleed Al Hamoudi 1 , * , Hatem Khalaf 2 , Naglaa Allam 2 , Mohammed Al Sebayel 2

1 Gastroenterology Unit, King Saud University, [email protected], 11461, Saudi Arabia

2 Department of Liver Transplantation and Hepatobiliary-Pancreatic Surgery, King Faisal Specialist Hospital and Research Center, Saudi Arabia

How to Cite: Al Hamoudi W , Khalaf H , Allam N , Al Sebayel M . Coincidental Occurrence of Hepatocellular Carcinoma and Cholangiocarcinoma (Collision Tumors) After Liver Transplantation: A Case Report, Hepat Mon. 2012 ; 12(10):5871. doi: 10.5812/hepatmon.5871.

ARTICLE INFORMATION

Hepatitis Monthly: 12 (10); 5871
Published Online: October 28, 2012
Article Type: Case Report
Received: April 20, 2012
Accepted: October 11, 2012
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Abstract

Coincidental occurrence of hepatocellular carcinoma (HCC) and cholangiocarcinoma, known as collision tumors, within a cirrhotic liver is rare. Herein, we report a case of liver transplantation (LT) in a patient with such collision tumors. Our patient was a 56-year-old woman with hepatitis C virus-related cirrhosis and 2 focal hepatic lesions, measuring 1.5 and 3 cm, in the liver segments 8 and 5, respectively. The lesion on segment 8 showed the typical radiological characteristics of HCC; however, the lesion in segment 5 showed an atypical vascular pattern and was closely associated with the inferior vena cava. Serum alpha-fetoprotein level was normal and serum carbohydrate antigen 19-9 (CA19-9) level was slightly elevated (63 U/mL); the extrahepatic spread of HCC was ruled out. The patient underwent an uneventful deceased-donor LT. Histopathological examination of the explant confirmed that the lesion on segment 8 was an HCC, but surprisingly, the lesion on segment 5 was found to be a cholangiocarcinoma. Six months after LT, the serum CA19-9 level was markedly elevated (255 U/mL), and the patient began experiencing abdominal pain. Magnetic resonance imaging showed enlarged hilar and paraaortic lymph nodes that were suggestive of metastases; histopathological analysis using ultrasound (US)-guided biopsy confirmed recurrent cholangiocarcinoma. Unfortunately, the patient died because of tumor recurrence 9 months after LT.\r\nCollision tumor resulting from the co-existence HCC and cholangiocarcinoma in a cirrhotic liver is rare and has a negative impact on the outcome of LT. Atypical vascular pattern and elevated serum CA19-9 levels are suggestive of such tumors; patients with these findings should undergo a targeted biopsy to rule out the coincidental occurrence of HCC and cholangiocarcinoma.

Keywords

Hepatic Lesion Biopsy Recurrence CA19-9 Antigen

© 2012, Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.

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