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Chok et al.                                                                                                                                                    Pheochromocytoma mimicking primary liver cancer

           To our surprise, no liver lesion was found. Instead,   Patient consent
           there was a solitary 8-cm retroperitoneal mass with   Consent form was obtained from the patient.
           very vascular blood supply. Complete resection was
           done. Further hormonal and genetic workup confirmed   Ethics approval
           that the mass was a rare occurrence of extra-adrenal   According to regulation of Queen Mary Hospital, no
           pheochromocytoma rather than a multiple endocrine   approval is needed for this kind of studies as long as
           neoplasia type 2.                                  patients’ identity is not disclosed.

           In the literature, there are a few reports of extra-adrenal   REFERENCES
           pheochromocytoma. [3-5]  It is rare and therefore easily
           overlooked, and it could easily be misdiagnosed as   1.   Hong Kong Cancer Registry. Available from: www3.ha.org.hk/
           primary liver cancer. The lesson to learn from the    cancereg. [Last Accessed 2016 Oct 14].
           present case is that extra-adrenal pheochromocytoma, a   2.   Bruix J, Sherman M; American Association for the Study of Liver
                                                                 Diseases. Management of hepatocellular carcinoma: an update.
           potentially life-threatening disease, should be included on   Hepatology 2011;53:1020-2.
           the list of candidate conditions for differential diagnosis.  3.   You Z, Deng Y, Shrestha A, Li F, Cheng N. Primary malignant
                                                                 hepatic paraganglioma mimicking liver tumor: a case report. Oncol
           Financial support and sponsorship                     Lett 2015;10:1176-8.
           None.                                              4.   Chang H, Xu L, Mu Q. Primary functioning hepatic paraganglioma:
                                                                 a case report. Adv Ther 2006;23:817-20.
           Conflicts of interest                              5.   Collier NA, Allison DJ, Vermess M, Blumgart LH. Right upper
                                                                 quadrant abdominal masses mimicking hepatic tumours: an approach
           There are no conflicts of interest.                   to management. Aust N Z J Surg 1984;54:113-8.




















































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