en Pediatric Hematology & Oncology Pediatric Hematology & Oncology پژوهشي Original Article Synchronous cancer is referred to two or more histological distinct malignancies diagnosed during the same hospital admission. Globally more than 1 million people get colorectal cancer yearly resulting in about 0.5 million deaths. Vulvar cancer is the fourth most common gynecologic cancer (following the corpus uterine cancer, cancer of ovary and cervix) and comprises only 4 percent of malignancies of the female genital tract. Here we report a 63 year old female with diagnosis of synchronous vulvar carcinoma colorectal carcinoma. To our knowledge this patient is the only reported case with these two synchronous cancers without any special risk factor. Key words: Vulvar neoplasms, colorectal neoplasms, treatment. Vulvar neoplasms, colorectal neoplasms, treatment 151 152 http://ijbc.ir/browse.php?a_code=A-10-1-45&slc_lang=en&sid=1 Mohammadreza Vahidfar 10031947532846002086 10031947532846002086 No Alimeh Hossein Abdolahi 10031947532846002087 10031947532846002087 Yes Mojgan Karimi Zarchi 10031947532846002088 10031947532846002088 No