International Journal of Preventive Medicine (Int J Prev Med)2008-780252201401142302EN20140114Germ cell tumors compromise 15-20% of all anterior mediastinal <br />masses; 50-60% ofthese are benign mediastinal teratoma. There <br />may be mature, immature, and rarely with malignant component <br />within the tumor mass. There are more chances of malignancy <br />with immature type. We are reporting a case in 20-year young male <br />diagnosed as giant benign cystic teratoma which was adherent <br />to superior vena cava. The patient underwent surgical excision. <br />In follow up of 2 years, the patient is not having any complaints.<br /><strong>Keywords:</strong>Benign mediastinal tumor, extragonadal, giant <br />teratoma, surgeryhttp://ijpm.mui.ac.ir/index.php/ijpm/article/view/1297http://ijpm.mui.ac.ir/index.php/ijpm/article/download/1297/1365