Estradiol plasma levels elevation during follow-up for testicular Leydig-cell tumor is not an unfailing sign of recurrence.

We report a case of a benign testicular Leydig-Cell Tumor (LCT) that deceived us because of an estradiol (E2) plasma levels elevation 27 months after radical orchiectomy in a body builder patient with habits of red meat abuse and no steroid assumption, without any sign of tumor recurrence. The patient was therefore asked to stop red meat assumption and E2 plasma levels returned normal. The restoration of red meat assumption showed a trend of increasing E2 plasma levels above normal range. Despite the documented usefulness of E2 plasma levels evaluation during the follow-up of LCT, elevation of this hormone could be related to other causes and presence of the so-called evironmental xenoestrogens may be one of these.