We present a case of a parosteal osteosarcoma mimicking an osteochondroma with atypical clinical features, radiographic findings, and histological examination. This report serves to exemplify the importance of recognizing the similarities between these 2 entities and other peculiar features that will help to differentiate between sessile osteochondromas and parosteal osteosarcomas, to prevent misdiagnosis.
To read this article in full you will need to make a payment
Purchase one-time access:Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online access
One-time access price info
- For academic or personal research use, select 'Academic and Personal'
- For corporate R&D use, select 'Corporate R&D Professionals'
Subscribe:Subscribe to Journal of Hand Surgery
Already a print subscriber? Claim online access
Already an online subscriber? Sign in
Register: Create an account
Institutional Access: Sign in to ScienceDirect
- Surface osteosarcomas: diagnosis, treatment and outcome.Indian J Orthop. 2014; 48: 255-261
- Diagnosing musculoskeletal tumours.Sarcoma. 2001; 5: 89-94
- Parosteal osteogenic sarcoma arising in cranial bones: clinical and radiologic features in eight patients.AJR Am J Roentgenol. 1990; 155: 113-117
- Parosteal osteosarcoma of the tarsus.Arch Orthop Trauma Surg. 1997; 116: 437-439
- Parosteal osteosarcoma: a clinicopathological study.J Bone Joint Surg Am. 1994; 76: 366-378
- Osteochondromalike parosteal osteosarcoma: a report of six cases of a new entity.AJR Am J Roentgenol. 1998; 170: 1571-1577
- Parosteal osteosarcoma: value of MR imaging and CT in the prediction of histologic grade.Radiology. 1996; 201: 837-842
- Extra-osseous localized non-neoplastic bone and cartilage formation (so-called myositis ossificans): clinical and pathological confusion with malignant neoplasms.J Bone Joint Surg Am. 1958; 40: 279-298
- Osteosarcoma: ESMO clinical recommendations for diagnosis, treatment and follow-up.Ann Oncol. 2009; 20: 137-139
- Imaging of osteochondroma: variants and complications with radiologic-pathologic correlation.Radiographics. 2000; 20: 1407-1434
- Parosteal osteosarcoma of the scapula.J Korean Med Sci. 1999; 14: 586-588
- A popliteal giant synovial osteochondroma mimicking a parosteal osteosarcoma.World J Surg Oncol. 2013; 11: 241
- Immunohistochemical analysis of MDM2 and CDK4 distinguishes low-grade osteosarcoma from benign mimics.Mod Pathol. 2010; 23: 1279-1288
- Osteochondroma-like parosteal osteosarcoma.Indian J Pathol Microbiol. 2008; 51: 58-60
Published online: September 14, 2017
Accepted: July 12, 2017
Received: February 22, 2016
No benefits in any form have been received or will be received related directly or indirectly to the subject of this article.
© 2017 by the American Society for Surgery of the Hand. All rights reserved.