[Ovarian reserve and premature ovarian failure in girls and adolescents after hematopoietic stem cell transplantation]. / Reserva ovárica y falla ovárica prematura en niñas y adolescentes postrasplante de progenitores hematopoyéticos.

ABSTRACT

INTRODUCTION: The increased survival of children and adolescents after Stem Cell Transplantation (SCT) has allowed us to gain a better understanding of the late effects that this procedure might have. OBJECTIVE: to measure ovarian function and reserve after SCT. PATIENTS AND METHOD: A descriptive, observatio nal, and cross-sectional study of girls and adolescents with SCT between 1999 and 2011. External gynecologic examination, hormone tests, and abdominal gynecologic ultrasound were performed, observing pubertal development pre-SCT. The following data from the clinical record were recorded baseline pathology, type of conditioning, use of radiotherapy in conditioning, age at the time of SCT, and history of acute or chronic graft-versus-host disease (GVHD). Hormonal tests included follicle- stimulating hormone (FSH), luteinizing hormone (LH), estradiol, prolactin (PRL), thyroid-stimula ting hormone (TSH), free thyroxine, total testosterone, sex hormone-binding globulin (SHBG), and anti-Müllerian hormone (AMH). Statistical analysis included the chi-square or Fisher's Exact test with a p-value < 0.05. RESULTS: 41 patients were evaluated. The median age at the time of SCT was 6.8 years (1.5-14.1) and the median age at evaluation was 14.8 years (range 4-25.4 years). 93% of the transplants were in patients with oncological disease and with myeloablative conditioning regimens. All patients presented decreased ovarian reserve, and 72% showed Premature Ovarian Failure (POF). CONCLUSIONS: All patients had decreased ovarian reserve and most of them had a high prevalence of POF. Before SCT, a gynecological evaluation and subsequent follow-up for hormone monitoring and initiation of hormone replacement are essential.