en Obstetrics & Gynicology Obstetrics & Gynicology case report case report <p style="margin: 0cm 0cm 0pt 161.6pt; text-indent: 0cm;"><font face="Times New Roman"><b><i><span style="color: blue; font-size: 10pt;">Background: </span></i></b><span style="font-size: 10pt;"><font color="#000000">Ovarian cancer is the most common cause of cancer death worldwide. Incidence of ovarian cancer is more common in postmenopausal women. Premenopausal onset is rare and the present study described two cases of ovarian clear cell tumors in young women.</font></span></font></p> <p style="margin: 0cm 0cm 0pt 161.6pt; text-indent: 0cm;"><font face="Times New Roman"><b><i><span style="color: blue; font-size: 10pt;">Case Presentation:</span></i></b><span style="font-size: 10pt;"><font color="#000000"> The patients presented with pelvic mass which was confirmed by sonography and laparotomy and final diagnosis was made according to histologic examination. Both patients showed a solid mass with cystic components in adnexal areas and explorative laparotomy demonstrated extension of tumors to abdomen in both patients. The level of CA 125 increased in both patients. For both tumors, immunohistochemical stainings were positive for CK7 and CD15, but CK20 was negative.</font></span></font></p> <p style="margin: 0cm 0cm 0pt 161.6pt; text-indent: 0cm;"><font face="Times New Roman"><b><i><span style="color: blue; font-size: 10pt;">Conclusion: </span></i></b><span style="font-size: 10pt;"><font color="#000000">Although ovarian clear cell tumor is usually diagnosed in postmenopausal women but its diagnosis should be suspected in young women with pelvic mass.</font></span></font></p> ovarian neoplasms, clear cell carcinoma, young adult 228 231 http://caspjim.com/browse.php?a_code=A-10-51-1&slc_lang=en&sid=1 Mahdieh Rajabi-Moghaddam rajabimmh@gmail.com 10031947532846006078 10031947532846006078 Yes Department of Pathology, Babol Universitu of Medical Sciences, Babol, Iran Mohammad Ranaee drm.ranaee@yahoo.com 10031947532846006079 10031947532846006079 No Department of Pathology, Babol Universitu of Medical Sciences, Babol, Iran Shahla Yazdani sh.yazdani@mubabol.ac.ir 10031947532846006080 10031947532846006080 No Department of Obstetrics and Gynecology, Babol University of Medical Sciences, Babol, Iran Seyyed Reza Modarres r.modarres@mubabol.ac.ir 10031947532846006081 10031947532846006081 No Department of Surgery, Babol University of Medical Sciences, Babol, Iran