en پژوهشي Research <strong>Introduction</strong>: Epidemiologic data of upper extremity tumors are still few and sometimes conflicting. In our department, hand surgeons manage these tumors. Good documentation of patients&rsquo; information permitted us to make an epidemiologic study on the tumors of the upper extremity operated in our department.<br> <strong>Methods:</strong> We retrospectively studied all the cases of upper extremity tumors operated from 1992 to 2012. The required files were collected from the hospital&rsquo;s databank and the pathology report from the registry of the department of histology.<br> <strong>Results:</strong> The mean age of patients was 37.91 years (from 3 to 83 years). The series included 100 patients (60 women and 40 men). Tumors concerned soft tissues in 78 cases (78%), bone in 18 cases (18%), and skin in 4 cases. Nearly all the malignant hand tumors were found in men (5 males, one female).<br> <strong>Conclusions:</strong> The data are comparable to other published studies. Upper extremity tumors are more prevalent in females (60%). The prevalence of bone tumors (18%) in our study is greater than other studies (from 1.6% to 11.4%) and the prevalence of skin tumors is lower (4%). Except for skin tumors where recruitment modalities are more variable, this series seems to be a good reflection of the prevalence of the different types of hand and wrist tumors. Upper extremity, Bone tumor, Skin tumor, Osteosarcoma, Lipoma 47 50 http://jsurgery.bums.ac.ir/browse.php?a_code=A-11-92-1&slc_lang=en&sid=1 Seyed Hamzeh Mousavie s.hamzah.mousavie@gmail.com 10031947532846003138 10031947532846003138 No Assistant Professor of General Surgery, Department of Surgery, Iran University of Medical Sciences, Rasool akram Hospital, Tehran, Iran Shahram Nazerani snazeranimd@gmail.com 10031947532846003139 10031947532846003139 Yes Professor of General Surgery, Department of Surgery, Iran University of Medical Sciences, Rasool akram Hospital, Tehran, Iran Jalil Shoa Alhasani jalil.shoa@gmai.com 10031947532846003140 10031947532846003140 No Department of Surgery, Iran University of Medical Sciences, Rasool akram Hospital, Tehran, Iran Ali Reza Negahi ar.negahi@gmail.com 10031947532846003141 10031947532846003141 No Assistant Professor of General Surgery, Department of Surgery, Iran University of Medical Sciences, Rasool akram Hospital, Tehran, Iran Pooya Derakhshan pooyaderakh@yahoo.com 10031947532846003142 10031947532846003142 No Assistant Professor of Anesthesiology, Department of Anesthesiology, Iran University of Medical Sciences, Rasool akram Hospital, Tehran, Iran