Tamoxifeno y tumoraciones anexiales complejas en paciente trasplantada renal con carcinoma in situ de mama

Tamoxifen is a selective modulator of estrogen receptors and is used to reduce recurrence and mortality rates in breast cancer patients with positive hormone receptors. This drug acts as an estrogen receptor agonist in the ovaries and endometrium and can produce some adverse effects. We report the case of a breast cancer patient, who was premenopausal until the beginning of the treatment and who developed bilateral complex adnexal cysts, requiring a diagnostic laparoscopy to exclude a new oncologic process in the ovaries. The patient had previously received a kidney transplant for nephropathy and immunosuppressive therapy. We review the literature on the topic and evaluate the possible associations between these processes.