Osteoid osteoma simulating an osteocartilaginous exostosis

Authors: Marinelli, A.¹; Giacomini, S.²; Bianchi, G.²; Pellacani, A.²; Bertoni, F.³; Mercuri, M.²

Source: Skeletal Radiology, Volume 33, Number 3, March 2004 , pp. 181-185(5)

Publisher: Springer

Buy & download fulltext article:

Price: $47.00 plus tax (Refund Policy)

Abstract:

We describe a case of osteoid osteoma in the tibia of a 3-year-old patient who presented with a clinical and radiographic picture that suggested an exostosis. The formation of osteoid osteoma with a radiographic picture similar to that of osteophytes or exostosis has been previously documented only rarely. The authors hypothesize that the exostosis-like formation observed was actually the calcification of soft tissues that formed after the intense periosteal inflammatory reaction caused by the osteoid osteoma. As a result of its peculiar clinical and radiographic presentation, diagnosis of this lesion was delayed. Being located close to the medial growth plate of the tibia, it caused lengthening of the limb with a pronounced valgus deviation of the knee. An excisional biopsy provided histological evidence, clinical resolution and immediate pain relief, but incomplete resolution of the valgus deformity of the knee.

Keywords: Tibia; Osteoid osteoma; Valgus deviation; Radiography; CT; MR

Document Type: Research article

DOI: http://dx.doi.org/10.1007/s00256-003-0731-0

Affiliations: 1: Rizzoli Orthopedic Institute, University of Bologna, Via Pupilli 1, 40127, Bologna, Italy, Email: alemarinelli@libero.it 2: Rizzoli Orthopedic Institute, University of Bologna, Via Pupilli 1, 40127, Bologna, Italy, 3: Pathology Department, Rizzoli Orthopedic Institute, University of Bologna, Italy,

Publication date: 2004-03-01