Sacrococcygeal Teratoma — RACP Paediatrics MCQ

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ModerateNeonatologySacrococcygeal TeratomaRACP Paediatrics

A term newborn has a large sacrococcygeal mass noted at birth. The mass is predominantly external and well-encapsulated. What is the most likely diagnosis?

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Correct answer: B — Sacrococcygeal teratoma

Sacrococcygeal teratoma (SCT) is the most common tumour in neonates. Most are diagnosed at birth as a visible mass arising from the sacrococcygeal region. The Altman classification describes the extent (type I is predominantly external, type IV is entirely presacral). Early surgical resection is recommended as delayed surgery increases the risk of malignant transformation. Alpha-fetoprotein levels are monitored.

Reference: RCH Melbourne – 2024 – Clinical Practice Guidelines: Neonatal Tumours