Hepatic Lesions Detected after Mastectomy, in Breast Cancer Patients with Hepatitis Background May Need to Undergo Liver Biopsy to Rule Out Second Primary Hepatocellular Carcinoma

Purpose Liver metastasis is a common phenomenon in breast cancer patients. Hepatic lesions detected in breast cancer patients may be easily misdiagnosed as metastatic sites, rather than being treated as primary foci. This descriptive study aims to investigate the clinicopathological characteristics of second primary hepatocellular carcinoma in breast cancer patients and to infer in which circumstances liver biopsy is needed. Methods Eighty-one consecutive breast cancer patients with hepatic lesions admitted to our department were retrospectively studied and analyzed from January 2009 to March 2014 according to Warren and Gates’ criteria for second primary cancers. Results Second primary hepatocellular carcinoma was observed in sixteen of seventy eight patients with breast cancer. There was a significant difference in HBV status between the second HCC group and liver metastases group (P<0.0001). There was no significant difference in age (P = 0.2254) and family history (P = 0.1160) between second primary HCC and metastases group. Two of these patients had synchronous second primary hepatocellular carcinoma and the remaining fourteen patients had metachronous second primary HCC. All sixteen patients were infected with hepatitis, including hepatitis virus B and C, or resolved HBV infection. Conclusions Breast cancer patients with either HBV infection or resolved HBV infection, regardless of an elevated AFP level, may receive liver biopsy to avoid unnecessary and inappropriate treatments for metastasis. Awareness of second primary HCC in breast cancer patients needs to be emphasized.