Deformation of the patellofemoral joint caused by synovial hemangioma: a case reportMaeyama, Akiraa; Saeki, Kazuhikoa; Hamasaki, Makotob; Kato, Yukic; Naito, MasatoshiaJournal of Pediatric Orthopaedics B: July 2014 - Volume 23 - Issue 4 - p 346–349 doi: 10.1097/BPB.0000000000000047 Lower Limb Abstract Author Information A 15-year-old girl with synovial hemangioma of the knee joint presented with gait pain and occasional sudden swelling for over 7 years. Plain radiographs showed an irregular joint line and a lateral shift of the patella caused by malformation of the patellar groove. Arthroscopy was performed to resect the tumor and to release the lateral patellar retinaculum. If the synovial hemangioma exists in the patellofemoral joint during the growth period, we propose that early surgical treatment is necessary to avoid the deformation of the joint. aDepartment of Orthopaedic Surgery, Fukuoka University bDepartment of Pathology, Fukuoka University Hospital, Fukuoka cDepartment of Orthopaedic Surgery, Nihon University School of Medicine, Tokyo, Japan Correspondence to Akira Maeyama, MD, PhD, Department of Orthopaedic Surgery, Fukuoka University, 7-45-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan Tel: +81 92 801 1011; fax: +81 92 864 9055; e-mail: email@example.com © 2014 by Lippincott Williams & Wilkins, Inc.