en Hand Surgery Hand Surgery Original Research Original Research <p> <strong> Background<a name="OLE_LINK2"></a><a name="OLE_LINK1"></a><a name="OLE_LINK4"> : </a></strong>The hand and wrist bones are infrequent sites for osteoid osteoma, and its diagnosis can be difficult. This paper reports 25 cases of osteoid osteoma in the hand and wrist. </p><p> <strong> Methods </strong>: Records of the 25 patients who had pathological conditions of osteoid osteoma of the hand and wrist were reviewed and analyzed. </p><p> <strong> Results </strong>: Twenty-five cases of osteoid osteoma of the hand and wrist were treated in 20 years period. The average age was 25.2±7.6 years (range, 16 to 46 years) with men to women and right to left side ratio of 5.25 and 4 respectively. The most common site was in the proximal phalanx (ten cases). The diagnosis was made using x-rays, three- phase Technetium bone scans, CT, and MRI and all the diagnoses were confirmed by histological examination. The average time from the onset of symptom to successful treatment was 16.3±11.1 months, and at a mean follow-up of 36.6±46.9 mouths. Five recurrences of disease took place in which three of them were operated elsewhere. All five patients subsequently were treated and cured by reoperation. </p><p> <strong> Conclusion </strong>: Osteoid osteoma is relatively rare lesions in the hand and wrist that can be a persistent source of hand and wrist pain. Patients under age of 40 who have otherwise unexplained pain should be evaluated. </p><p> <strong> </strong></p> Wrist, Hand, Tumor, Osteoid osteoma. 62 66 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-1-574&slc_lang=en&sid=1 Davood Jafari djafari@tums.ac.ir 20031947532846007649 20031947532846007649 No Shafa Yahyaian Hospital, Tehran University of Medical Sciences, Tehran, Iran. Hooman Shariatzade shariatzade-h@hotmail.com 20031947532846007650 20031947532846007650 No , Department of Hand Surgery, Shafa Yahyaian Hospital, Tehran University of Medical Sciences, Tehran, Iran. Farid Najd Mazhar fnajdmazhar@yahoo.com 20031947532846007651 20031947532846007651 No Department of hand Surgery, Shafa Yahyaian Hospital, Tehran University of Medical Sciences, Tehran, Iran. Behzad Abbasgholizadeh babbasgholizadeh@ymail.com 20031947532846007652 20031947532846007652 Yes , Department of Hand Surgery, ShafaYahyaian Hospital, Baharestan Sq, Tehran, Iran. Ahmad Dashtebozorgh 20031947532846007653 20031947532846007653 No Tehran University of Medical Sciences, Tehran, Iran.