大多数禾本科胚有一片瓣状结构通常称为外胚叶。
Most grass embryos have a flap-like structure known as the epiblast.
目的：研究少汗性外胚叶发育不全引起先天缺牙的ED1基因突变。
Objective: To detect ED1 gene mutation in three hypohidrotic ectodermal dysplasia (HED) nuclear families.
在体图上表现出体由分散的内、外胚叶型，向中胚叶型集中的现象。
The physique picture shows the physique will centralize from scattered endoderm and ectobl…
资料与方法搜集5例骨原始神经外胚叶肿瘤的影像及临床、手术病理资料，分析其影像学表现。
Materials and Methods The radiological features, clinic and pathological data of 5 patients with bone PNETs were retrospectively analyzed.
结论溶骨性骨破坏和巨大软组织肿块是骨原始神经外胚叶肿瘤的常见影像学表现，病灶内钙化和局部淋巴结肿大少见。
Conclusion The osteolytic lesion and a large soft tissue mass are common radiological appearances of bone PNETs and calcification and regional lymphadenopathy are rarely seen.
脑胶质瘤是由神经外胚叶衍化而来的胶质细胞即星形胶质细胞、少枝胶质细胞和室管膜胶质细胞等发生的肿瘤，是颅内最常见的恶性肿瘤。
Glioma is the most common type of primary intracranial tumors in human. It developed from astrocytoma, oligodendroglioma, ependymoma, which were induced by neural ectoblast.
脑胶质瘤是由神经外胚叶衍化而来的胶质细胞即星形胶质细胞、少枝胶质细胞和室管膜胶质细胞等发生的肿瘤，是颅内最常见的恶性肿瘤。
Glioma is the most common type of primary intracranial tumors in human. It developed from astrocytoma, oligodendroglioma, ependymoma, which were induced by neural ectoblast.
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