HIP AND THIGHExtraskeletal osteochondroma near the hip: a pediatric caseLiu, Zhen Jiang; Zhao, Qun; Zhang, Li JunAuthor Information Department of Pediatric Orthopedics, The Shengjing Hospital, China Medical University, Heping District, Shenyang, Liaoning, PR China Correspondence to Zhen Jiang Liu, MD, Department of Pediatric Orthopedics, The Shengjing Hospital, China Medical University, No. 36 Sanhao St Heping District, Shenyang, Liaoning 110004, PR China Tel: +86 24 96615 57511; fax: +86 24 2392 9903; e-mail: [email protected] Journal of Pediatric Orthopaedics B: November 2010 - Volume 19 - Issue 6 - p 524-528 doi: 10.1097/BPB.0b013e32833ed8e9 Buy Metrics Abstract Extraskeletal osteochondroma near the hip is rare and its pathological diagnosis is based on radiological and histopathological examination. It is vital that such a diagnosis be considered when a discrete, ossified mass is localized in soft tissues, even at atypical sites. Differential diagnoses include myositis ossificans, a lipomatous lesion, a pseudomalignant osseous tumour, an ossifying fibromyxoid tumour, an extraskeletal chondroma with endochondral ossification, synovial (osteo) chondromatosis, tumoural calcinosis, a synovial sarcoma and an extraskeletal osteosarcoma. Clinical awareness of this benign entity is important as no malignant transformation or metastasis has been reported. Marginal excision with histopathological identification is the treatment of choice. © 2010 Lippincott Williams & Wilkins, Inc.