Synovial hemangiomas are benign rare tumors of vascular origin. They are frequently seen in children and young adults, they present wıth arthritis that affects a single joint. In this work, a 12 year old girl was admitted complaining of repeated right knee pain and swelling, the condition diagnosed as synovial hemangioma after a second surgical intervention according to histopathologic examination has been reported. A year ago she was treated surgıcally as having villonodular synovitis. One year followup of the second operation showed no recurrance of the mass observed clinically.In such cases either pre-operation or after with the histopathologic examinations some diagnosis problems will be seen. For an accurate treatment sinovial hemanjiyoma must be considered in clinic and histopathologic examinations
