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.

• 结论：内胚窦瘤是一种恶性生殖细胞肿瘤，常常使生殖腺组织受累，包括眼眶在内的其他部位和少发生。