ArticleFrontiers in pediatrics2026
Neonatal mature teratoma arising from an intra-abdominal cryptorchid testis with torsion: a case report and literature review.
Article in Frontiers in pediatrics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: This study investigated the clinical characteristics, diagnostic considerations, and optimal management of a neonatal mature teratoma arising from an intra-abdominal cryptorchid testis complicated by torsion, a rare clinical entity. Methods: We retrospectively analyzed data from a full-term male neonate admitted in November 2025 with a prenatally detected intra-abdominal mass, including postnatal imaging, tumor marker assessment, surgical excision, and pathological confirmation. Concurrently, we conducted a systematic review of English-language literature using PubMed, Embase, Cochrane Library, and Web of Science. Results: The patient was diagnosed with a mature teratoma originating from an intra-abdominal cryptorchid testis. Intraoperative findings revealed 360° clockwise torsion causing colonic compression. Complete resection resulted in an uneventful recovery, with a physiological decline in serum alpha-fetoprotein (AFP) levels consistent with postnatal age-related maturation, and no recurrence at one-month follow-up. The literature review identified ten cases (including the present case) of prenatally detected ultrasound-detected tumors with progressive tumor growth. Surgical management primarily involved laparoscopic surgery (40.0%) or laparotomy (60.0%). Mature teratomas were the predominant pathology (90.0%), tumor torsion occurred in 20.0% of cases, and no recurrences were reported, indicating a favorable prognosis. Conclusion: Neonatal mature teratomas arising from an intra-abdominal cryptorchid testis with torsion are exceedingly rare. Evaluation of testicular position should be routine in male neonates with intra-abdominal masses, and gonadal tumors should be included in the differential diagnosis. Multidisciplinary, individualized management is essential for optimizing outcomes.
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