Colon cancer seeding after percutaneous fine needle aspiration of liver metastasis.

Fine needle aspiration or biopsy is used for cytologic diagnosis of many intra-abdominal tumors including focal liver lesions. The incidence of needle tract seeding is quite low. In this paper the first case of cutaneous seeding after percutaneous fine needle aspiration of liver metastasis is reported in a case of colon cancer. We suggest using this method for cytologic diagnosis in hepatic tumors when surgical resection is not possible and when patients will be treated with invasive therapies and to avoid fine needle aspiration biopsy in patients undergoing surgical resection or when there is a confident diagnosis of HCC by non-invasive procedures.