Rare malposition of a central venous catheter into the left internal mammary vein in a liver transplantation patient

We report a rare malposition of a central venous catheter in a liver transplantation patient which occurred during an intensive care period. The waveform of central venous pressure was aberrant after connecting the catheter to the pressure kit transducer. It was misplaced into left internal mammary vein confirmed by thoracic computed tomography. Significant engorgement of the left internal mammary vein may have been the cause of this rare malposition.