Steering clear of incorrect laboratory reference ranges in Leydig cell testicular tumor-induced peripheral precocious puberty: A case report.
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Leydig cell tumors are rare pediatric testicular neoplasms. We report a case of an 8-year-old boy who presented with early pubertal progression, including pubic hair and voice deepening, yet with biochemical results suggesting a prepubertal state. Normal testosterone levels and a flat Gonadotropin Releasing Hormone (GnRH) stimulation test response, bone age was advanced. Careful examination revealed asymmetric testicular size, and ultrasound identified right intratesticular lesion. Histopathology following unilateral orchiectomy confirmed a LCT. This case illustrates the diagnostic trap of relying solely on available laboratory reference ranges. It highlights the critical role of multidisciplinary approach when laboratory data appear inconsistent.