Prenatally diagnosed intra-abdominal testicular teratoma managed with single-stage Fowler-Stephens orchiopexy postnatally: A case report and literature review.

Fetal intra-abdominal testicular tumors diagnosed prenatally are exceedingly rare. However, the increasing utilization of prenatal ultrasound has led to the identification of these uncommon neoplasms. The present study reports the case of a 1-month-old male infant in whom an intra-abdominal mass was first identified on a fetal ultrasound performed at 28 weeks of gestation. Postnatally, the patient underwent complete tumor excision followed by single-stage Fowler-Stephens orchiopexy. The 7 months postoperative follow-up revealed normal findings. To the best of our knowledge, this is the first reported case of prenatally diagnosed intra-abdominal cryptorchidism associated with a mature teratoma, successfully managed with testis-sparing surgery (TSS) using Fowler-Stephens orchiopexy. The present study represents the ninth such case reported worldwide. Although neonatal testicular tumors generally require surgical excision, intraoperative frozen section analysis combined with TSS can effectively prevent unnecessary orchiectomy and enable the potential for bilateral fertility preservation.