Selected TopicsA Bone Cyst Treated With Corticosteroid Installation in an Osteopetrotic ChildAl-Aubaidi, Zaid MD; Pedersen, Niels Wisbech MDAuthor Information Department of Orthopaedics, Odense University Hospital, Odense, Denmark Source of support: None of the authors received any financial support for this study. Reprint: Zaid Al-Aubaidi, MD, Department of Orthopaedics, Odense University Hospital, Soender Boulevard 29, DK-5000 Odense C, Denmark. E-mail: [email protected]. Journal of Pediatric Orthopaedics: March 2010 - Volume 30 - Issue 2 - p 206-207 doi: 10.1097/BPO.0b013e3181cfcd63 Buy Metrics Abstract Bone cysts in patients suffering from osteopetrosis are uncommon. A pathologic fracture might cause therapeutic difficulties because of the osteosclerotic bone. We describe a patient with an autosomal dominant osteopetrosis suffering from a large bone cyst in the proximal femur. The cyst was treated with local injections of corticosteroid and healed completely after 2 injections. To our knowledge, this is the first time that the occurrence of bone cysts has been reported in osteopetrotic patients, which responds effectively and lastingly to steroid injection. © 2010 Lippincott Williams & Wilkins, Inc.