1, These cells are known as endodermal cells.

2, Surgery and pathology revealed endodermal cyst.

3, Conclusions: Endodermal sinus tumor is a malignant germ-cell tumor that usually involves the gonadal tissue. Primary extragonadal sites occur rarely, and include the orbit.

4, Conclusions The endodermal sinus tumor of the ovary stands first in the incidence of malignant germ cell tumors of the ovary in China.

5, An endodermal sinus tumor (yolk sac tumor) of the testis is shown composed of primitive germ cells that form glomeruloid or embryonal-like structures.

6, Objective To study the CT manifestation of testicular endodermal sinus tumor in childhood.

7, Nine Children with endodermal sinus tumor oftestis have been treated since 1982.

8, Objective To analyze treatment and prognosis of sacrococcygeal endodermal sinus tumor.

9, The liver of Alligator sinensis was formed by the endodermal epithelia invigilated from the edge of foregut door and by surrounding mesoderm during early stages of pre-natal development.

10, The benign teratoma as seen from pathological reports with upward AFP,(http:///endodermal.html) should be checked very carefully to assure there were endodermal sinus tissue in teratoma tissues or not.

11, Objectives To describe the clinical characteristics and the role of chemotherapy in endodermal sinus tumor of the vagina.

12, Result To study patients, 20 immature teratoma (IT), 11 endodermal sinus tumor, 8 dysgerminoma, 6 mixed germ cell tumors.

13, Objective to summarize the clinical character, treatment and prognosis of adult testis endodermal sinus tumor.

14, Objective To Summarize the treatment and prognosis in 40 cases with ovarian endodermal sinus tumor.