en Surgery Surgery case report case report <span style="font-size:14px;"><span style="font-family:Times New Roman;"><strong><span style="color:#0000ff;"><em>Background:</em></span></strong> Bilateral synchronous testis germ cell tumors with different histopathology are not common.<br> <strong><span style="color:#0000ff;"><em>Case Presentation:</em></span></strong> Here, a case of 27-year-old male who is reported presented with bilateral testicular swellings. There was a high &alpha;-fetoprotein level with bilateral lesions on scrotal USG. Bilateral orchiectomy was performed. According to pathology report, there was a right testicular seminoma and left testicular mixed germ cell tumor composed of seminoma, yolk sac tumor and embryonal carcinoma.<br> <strong><em><span style="color:#0000ff;">Conclusion:</span></em></strong> He received one cycle of chemotherapy with BEP regimens</span></span> Key Words: Testis, Tumors, Histology 446 449 http://caspjim.com/browse.php?a_code=A-10-815-3&slc_lang=en&sid=1 Ghasem Rostami ghasemrostami27@yahoo.com 100319475328460027843 100319475328460027843 Yes Student Research Committee, Babol University of Medical Science, Babol, Iran Hamid Shafi dr_hamidshafi@yahoo.com 100319475328460027844 100319475328460027844 No Cancer Research Center, Health Research Institute, Babol University of Medical Sciences, Babol Iran Mohammad Ranaee drm.ranaee@yahoo.com 100319475328460027845 100319475328460027845 No Department of Pathology, School of Medicine, Babol University of Medical Sciences, Babol, Iran Samaneh Saeedfar saeedfarsamaneh@gmail.com 100319475328460027846 100319475328460027846 No Student Research Committee, Babol University of Medical Science, Babol, Iran Fatemeh Mahmodloo fateme.mhloo1997@gmail.com 100319475328460027847 100319475328460027847 No Student Research Committee, Babol University of Medical Science, Babol, Iran