A malignant tumor composed of neuroblasts, originating in the autonomic nervous system or the adrenal medulla and occurring chiefly in infants and young children.

• 神经母细胞瘤一种由成神经细胞组成的恶性肿瘤，原发于自主神经系统或肾上腺骨髓中，主要见于婴幼儿中