脊素瘤(Chordoma)起源于胚胎残余的脊索,是一种低度恶性的肿瘤,较为罕见。此瘤多发生在中轴骨,半数以上发生在骶骨,其次为蝶枕部,尚可发生在其它部位的椎骨。多见于成人,男多于女。对其超微结构的研究,国内外文献报导的不多。本文 Chordoma originated in the residual spinal cord of the embryo and is a rare malignant tumor. This tumor occurred in the axial bones, more than half occurred in the sacrum, followed by the butterfly pillow Department, can still occur in other parts of the vertebra. More common in adults, more men than women. The research on its ultrastructure has not been reported in the literature at home and abroad. This article