骨化

Chromosomal abnormalities, single mutant genes, and maternal diabetes mellitus or ingestion of teratogens, such as antiepileptic drugs, are implicated in about 10% of the cases.

孕中期诊断无脑畸形基于颅顶和大脑半球缺乏，然而面骨、脑干和部分枕骨、中脑通常存在。大约50%的病例合并脊柱异常，早孕期，可在11周后做出诊断，因为此时，颅骨开始骨化。

Osteoblasts can be seen lining the lacunae in the newly developing fetal bone, and they deposit bone along calcified cartilagenous spicules.

在新生骨的骨陷窝周可见成骨细胞排列，这些细胞在钙化的软骨化骨周围沉积成骨。

Osteoblasts can be seen lining the lacunae in the newly developing fetal bone and they deposit bone along calcified cartilagenous spicules.

在新生骨的骨陷窝周可见成骨细胞排列，这些细胞在钙化的软骨化骨四周沉积成骨。

The combined cervicothoracic incison and sternotomy were performed for the exposure of the vertebral bodies, which were removed together with the herniated discs or the ossified posterior longitudinal ligaments, using the osteotomes and the air-drill. Fusion was done with the iliac bone graft.

手术取颈胸部联合切口，纵行劈开胸骨，显露颈胸段椎体，用切骨刀及气动球磨钻扩大开窗减压，去除椎体骨质、突出椎间盘或骨化的后纵韧带，取髂骨块行椎间植骨融合。

Results: All lesions showed classical features on CT with varying degree of matrix mineralisation, 8 of 10 located at attached bone of vertebral b...

结果：全部10例骨母细胞瘤病灶内部CT表现均为典型的斑点状或沙粒状骨化，10例中有8例位于附件骨，7例表现有周围不连续的硬化带，3例受累骨密度普遍增高，2例出现附近软组织肿胀影。

"In the most common, epiphyseal dysplasia, the ends of children's bone s grow and harden very slowly; dwarfism often results, and degenerative joint disease usually develops by middle age."

骨发育异常是在儿童发育期并不罕见的骨疾患，患儿骨的生长及骨化非常缓慢，常见侏儒症，亦可能只见下肢短小，到中年常发展为退行性关节疾患。

Found in February 2002 in a cave where bears hibernated in the Carpathian mountains in southwest Romania, the jaw was radiocarbon dated by a team led by Erik Trinkaus, an anthropology professor at Washington University in Saint Louis, Missouri.

这块化石，是2002年二月的时候，科考人员在罗马尼亚西南部一个熊用来冬眠的山洞里发现的。来自密素里州的圣路易华盛顿大学的人类学教授， Erik Trinkaus 带领他的同事们对这块颌骨化石进行了放射测定。确定了它存在的日期。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。