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An unusual cause of cancer mimicry following liver transplantation

Karim Qumosani, Natasha Chandok


Sirolimus is an approved anti-rejection agent following liver or kidney transplantation that works through inhibition of the mammalian target of rapamycin (mTOR). As sirolimus functions through a pathway independent of calcineurin inhibition, it may have less potential for nephrotoxicity and carcinogenesis. That being said, there are a myriad of potential adverse effects reported with sirolimus, many of which are severe and unknown or poorly understood. Herein we present a case of sirolimus causing a serious but uncommon adverse event in an adult liver transplant recipient; the adverse event in this instance unfortunately resulted in significant medical testing and morbidity. The adverse event profile of sirolimus is summarized through review of available evidence.

Key words. Sirolimus, Rapamune, Neoplasm, Adverse Drug Event

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The Official Journal of the Mexican Association of Hepatology, the Latin-American Association for the Study of the Liver and the Canadian Association for the Study of the Liver

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