en عمومى General گزارش مورد case report <span style="font-size:12pt"><span style="line-height:16.0pt"><span new="" roman="" style="font-family:" times=""><span lang="EN-IN" style="font-size:9.0pt">Synchronous (simultaneous) malignant lesions in different organs of a patient are very rare finding. Gastric and colon adenocarcinomas are the most common cancers worldwide but their synchronous occurrence is rare and only four percent of gastric cancer patients have simultaneous colon adenocarcinoma. Here, we report a 64-year-old woman with simultaneous gastric and colon adenocarcinoma presented by abdominal pain and hematemesis. </span></span></span></span><br> <span style="font-size:12pt"><span style="line-height:16.0pt"><span new="" roman="" style="font-family:" times=""><span style="font-size:9.0pt"></span></span></span></span> Colon Cancer, Gastric Adenocarcinoma, Synchronous Malignancy 7 10 http://ijrabms.umsu.ac.ir/browse.php?a_code=A-10-104-3&slc_lang=en&sid=1 Hengameh Mojdeganlou hengameh.mojdeganlou@gmail.com 10031947532846002573 10031947532846002573 No Department of Pathology, Faculty of medicine, Urmia University of Medical Sciences, Urmia, Iran Ata Abbasi aabbasi@alumnus.tums.ac.ir 10031947532846002574 10031947532846002574 Yes Department of Pathology, Faculty of medicine, Urmia University of Medical Sciences, Urmia, Iran Saeid Razavi Dizaji saeedrazavi80@yahoo.com 10031947532846002575 10031947532846002575 No Hematology, Immune cell therapy and stem cell transplantation research center, clinical research institute, Urmia University of Medical Sciences, Urmia, Iran Mohammad hosseiniazar mohammadazar@gmail.com 10031947532846002576 10031947532846002576 No Department of Internal Medicine, Faculty of medicine, Urmia University of Medical Sciences, Urmia, Iran rahim asghari rahimasghari@gmail.com 10031947532846002577 10031947532846002577 No Hematology, Immune cell therapy and stem cell transplantation research center, clinical research institute, Urmia University of Medical Sciences, Urmia, Iran