One of the least frequently encountered nongliomatous intraspinal neoplasm is the teratoma. Tumors that are not dermoid or epidermoid cyst have been reported as being teratomatous or teratoid when they do not have tissue derived from all three germ layers and when they are clearly most closely related to the trigerminal teratoma. Authors described an illustrated case report of teratoid cyst of the spinal cannal, summarized the previous report cases, and discuss the classification and origin of these tumors.
Classification ; Dermoid Cyst ; Epidermal Cyst ; Germ Layers ; Lumbosacral Region* ; Teratoma

In children, primary tumors of the third ventricle are uncommon. The majority of the lesion were infiltrating astrocytoma of the anterior portion of the third ventricle. Tumors within the third ventricle were benign, encapsulated, and respectable with good prognosis. But most surgerns have considered this tumors to be inoperable;accordingly shunting procedures followed by radiotherapy has been the treatment of choice. We recently experienced a case of astrocytoma which entirely filled the third ventricle with hemorrhage and reviewed the literatures.
Astrocytoma* ; Child ; Hemorrhage ; Humans ; Prognosis ; Radiotherapy ; Third Ventricle*