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To differentiate between retroperitoneal teratoma and neuroblastoma in newborns based on imaging and growth patterns.

Retroperitoneal Teratoma in Newborn Mimicking Neuroblastoma With Rapid Growth

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To differentiate between retroperitoneal teratoma and neuroblastoma in newborns based on imaging and growth patterns.
Evaluated a rapidly enlarging suprarenal mass identified during late gestation.
Conducted serial imaging post-birth to observe changes over time.
Performed complete resection to confirm the diagnosis.
Initial imaging suggested neuroblastoma due to solid-cystic appearance and nonspecific biochemical findings.
Serial imaging showed new calcifications and emerging fatty components, prompting reconsideration of the diagnosis.
Surgical confirmation identified the mass as an immature retroperitoneal teratoma.

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Case report reveals rapid tumor growth in newborn resembling neuroblastoma, indicating diagnostic challenges.

Murasawa et al. (2026) studied this question.

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