[MR lymphography: first application to human].

First clinical trial of MR lymphography is described. The subjects were two normal volunteers. The contrast agent was cideferron, which was an iron colloid. We obtained MR images of the inguinal lymph nodes before and after subcutaneous injection of the agent in the dorsal feet. As a result, the signal intensities on T2 weighted images remarkably decreased at two hours after injection and kept low until three months after. Although pigmentation around the injection site was observed, it was gradually fading within six months. In conclusion, MR lymphography with cideferron can be applied clinically.