en جراحی دست / آرنج Hand surgery / Elbow گزارش مورد Case Report <strong>Background</strong>: Intraosseous hemangiomas (IHs) are uncommon benign bone tumors that mainly affect the axial skeleton and rarely occur in long bones.<br> <strong>Case Presentation</strong>: In this study, a 35-year-old woman presented with a solitary IH in the proximal ulna of the right upper extremity, confirmed by x-ray and magnetic resonance imaging (MRI), showing a well-defined osteolytic lesion. The patient had a previous history of IH in the same area, first diagnosed at age 25 and treated with curettage surgery, followed by recurrence at age 28 requiring curettage. The patient underwent extended curettage to prevent pathological fractures despite pain and a mass in the right proximal ulna.<br> <strong>Conclusion</strong>: Post-curettage histological examination confirmed the diagnosis of IH. This is a rare case of recurrent long-bone hemangioma in the ulna. Hemangioma, Tumors, Intraosseous hemangiomas (IHs), Ulna 237 244 http://jros.iums.ac.ir/browse.php?a_code=A-10-1261-3&slc_lang=en&sid=1 Sam Hajialiloo Sami Saamhaji@gmail.com 10031947532846007661 10031947532846007661 No Bone and Joint Reconstruction Research Center, Shafayahyaian Hospital, Iran University of Medical Sciences, Tehran, Iran. Khalil Kargar Shooroki khalilkargar63@gmail.com 10031947532846007662 10031947532846007662 No Bone and Joint Reconstruction Research Center, Shafayahyaian Hospital, Iran University of Medical Sciences, Tehran, Iran. Masih Rikhtehgar masih.rikhtehgar83.mr@gmail.com 10031947532846007663 10031947532846007663 No Bone and Joint Reconstruction Research Center, Shafayahyaian Hospital, Iran University of Medical Sciences, Tehran, Iran. Nikoo Emtiazi Nikooemtiazi9@gmail.com 10031947532846007664 10031947532846007664 No Bone and Joint Reconstruction Research Center, Shafayahyaian Hospital, Iran University of Medical Sciences, Tehran, Iran. Reza Torab rztrb67@gmail.com 10031947532846007665 0009-0005-7274-2809 Yes Bone and Joint Reconstruction Research Center, Shafayahyaian Hospital, Iran University of Medical Sciences, Tehran, Iran.