Journal List > J Korean Orthop Assoc > v.47(6) > 1013196

TOOLS
Kim, Nam, Byun, Cho, and Yoo: Intra-Articular Osteochondroma of the Patella
Case Report
Journal of the Korean Orthopaedic Association

Journal of the Korean Orthopaedic Association 2012; 47(6): 468-472.

Published online: 28 December 2012

DOI: https://doi.org/10.4055/jkoa.2012.47.6.468

Intra-Articular Osteochondroma of the Patella

Ji-Hwan Kim, M.D., Seung-Oh Nam, M.D., Young-Soo Byun, M.D., Hun-Sik Cho, M.D., Hyun Seong Yoo, M.D.

Department of Orthopedic Surgery, Daegu Fatima Hospital, Daegu, Korea.

Correspondence to: Ji-Hwan Kim, M.D. Department of Orthopedic Surgery, Daegu Fatima Hospital, 99, Ayang-ro, Dong-gu, Daegu 701-724, Korea. TEL: +82-53-940-7320, FAX: +82-53-954-7417, hwan1260@naver.com

Received 13 August 2012       Revised 18 September 2012       Accepted 4 October 2012

Copyright © 2012 by The Korean Orthopaedic Association

(open-access):

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Osteochondroma is one of the most common benign tumors. However, intra-articular occurrence is rare, especially in the knee joint; this is a case of osteochondroma forming bony bridge with the patella. The authors experienced a case of intra-articular osteochondroma of the left patella observed in a 58-year-old female, so we reported it with a literature review.

Keywords: intra-articular osteochondroma, patella, knee

Figures and Tables

Figure 1
Preoperative plain radiographs of the left knee. Lateral view shows a mass-like lesion with bony shadow projecting from the inferior pole of patella.
jkoa-47-468-g001
Figure 2
Magnetic resonance imaging of the lesion sagittal T1, T2-weighted images show cortical and cancellous bony connection between the inhomogenous mass with marginal cartilage shadow and the posteromedial corner of the inferior pole of patella directly (arrow).
jkoa-47-468-g002
Figure 3
In operative field, the mass was rigidly connected with the inferior pole of patella through the bony bridge. There was no connection with infra-patellar fat pad, synovium or patellar tendon. The bony mass was excised clearly, (A) before and (B) after. The cut surface of bony bridge at the posteromedial corner (multi-arrow).
jkoa-47-468-g003
Figure 4
Postoperative plain radiographs show that intra-articular osteochondroma was clearly removed from the inferior pole of patella.
jkoa-47-468-g004
Figure 5
The excised specimen. This consists of ovoid polypoid bony tissue, measuring 3.2×2×2 cm. Cut section shows grayish thickened cartilage, of which cap thickness is 2 mm.
jkoa-47-468-g005
Figure 6
The microscopic finding of the excised mass (H&E, ×20). The typical findings of osteochondroma are seen.
jkoa-47-468-g006

References

1. Murphey MD, Choi JJ, Kransdorf MJ, Flemming DJ, Gannon FH. Imaging of osteochondroma: variants and complications with radiologic-pathologic correlation. Radiographics. 2000. 20:1407–1434.
2. Reith JD, Bauer TW, Joyce MJ. Paraarticular osteochondroma of the knee: report of 2 cases and review of the literature. Clin Orthop Relat Res. 1997. (334):225–232.
3. Jaffe HL. Tumors and tumorous conditions of the bones and joints. 1958. Philadelphia: Lea & Febiger;143–150. 558–567.
4. Han CS, Jeong BO, So DH. Intra-articular osteochondroma of the knee. J Korean Bone Joint Tumor Soc. 2004. 10:147–151.
5. Sohn SW, Kim IS. A case of intraarticular osteochondroma arising from patella. J Korean Orthop Assoc. 1998. 33:620–623.
6. Gulati Y, Maheshwari A, Sharma V, Mattoo R, Arora D, Gupta N. Extraskeletal osteochondroma of the thigh: a case report. Acta Orthop Belg. 2005. 71:115–118.
7. Lim Y, Kim ES, Shin JK, Kim BJ. Giant intraarticular osteochondroma in the knee joint of 14 years old athlete: report of 1 case. J Korean Knee Soc. 1993. 5:218–221.
8. Moon MS, Woo YK, Yang SW. Intra-articular osteochondroma of the knee: a case report. J Korean Orthop Assoc. 1984. 19:735–737.
9. Hagan PF, Schoenecker PL. Para-articular osteochondroma. Am J Orthop (Belle Mead NJ). 1995. 24:65–67.
10. Lee KH, Kang SI, Park CS, Kim MK, Kim MS. Giant intra-articular osteochondroma of the knee: a case report. J Korean Orthop Assoc. 1990. 25:973–975.
TOOLS
Similar articles