Teratoid hepatoblastoma (HB) is a variant of mixed HB described as having a mixture of heterologous components. A 3-year-old boy presented for a liver transplant evaluation due to persistent HB. His liver was biopsied as well as a perirenal mass. Histologic examination demonstrated elements of yolk sac tumor and review of original resection showed a neuroendocrine component. This unique combination of histology has not been reported before in HB. Also, this case presents a unique diagnostic challenge as it presented with a metastasis containing yolk sac elements. Recognition and awareness of this histologic variant are important to accurately identify metastatic lesions.

中文翻译：

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具有卵黄囊样和神经内分泌元件的畸胎样肝母细胞瘤。

畸胎样肝母细胞瘤 (HB) 是混合 HB 的一种变体，被描述为具有异源成分的混合物。一名 3 岁男孩因持续性 HB 接受肝移植评估。他的肝脏和肾周肿块都做了活检。组织学检查显示卵黄囊肿瘤成分，原始切除的复查显示神经内分泌成分。这种独特的组织学组合以前没有在 HB 中报道过。此外，该病例呈现出独特的诊断挑战，因为它呈现出含有卵黄囊成分的转移瘤。识别和了解这种组织学变异对于准确识别转移性病变很重要。