Giant Synovial Chondromatosis of the Knee Mimicking a Parosteal Osteosarcoma: A Case Report

Chang Ho Kang; Jong Hoon Park; Dae Hee Lee; Chul Hwan Kim; Jeong Mi Park; Won Seok Lee

doi:10.5292/jkbjts.2010.16.2.95

Journal List > J Korean Bone Joint Tumor Soc > v.16(2) > 1051982

Go to TopGo to Top Go to BottomGo to Bottom

TOOLS

Kang, Park, Lee, Kim, Park, and Lee: Giant Synovial Chondromatosis of the Knee Mimicking a Parosteal Osteosarcoma: A Case Report

Case Report

J Korean Bone Joint Tumor Soc 2010;16(2):95-98.

Published online: 17 December 2010

DOI: https://doi.org/10.5292/jkbjts.2010.16.2.95

Giant Synovial Chondromatosis of the Knee Mimicking a Parosteal Osteosarcoma: A Case Report

Chang Ho Kang, M.D.^∗, Jong Hoon Park, M.D., Dae Hee Lee, M.D., Chul Hwan Kim, M.D.^†, Jeong Mi Park, M.D.^‡, Won Seok Lee, M.D.

^∗Department of Orthopedic Surgery, Korea University Anam Hospital, Seoul, Korea

^∗Department of Radiology, Korea University Anam Hospital, Seoul, Korea

^†Department of Pathology, Korea University Anam Hospital, Seoul, Korea

^‡Department of Radiology, Catholic University St. Mary's Hospital, Seoul, Korea

Correspondence to: Jong Hoon Park, M.D. Department of Orthopedic Surgery, Korea University Anam Hospital, 126-1, Anam-dong 5-ga, Sungbuk-gu, Seoul 136-705, Korea TEL: +82-2-920-6609 FAX: +82-2-924-2471 E-mail: pjh1964@hanmail.net

Received 30 September 20105 November 2010 Accepted 30 November 2010

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

Synovial chondromatosis is a benign nodular cartilaginous proliferation arising in the synovium of joints. The radiolographic features of this condition are variable. Rarely, it would be confused with malignancy such as chondrosarcoma, osteosarcoma or synovial sarcoma. We report a case of primary synovial chondromatosis of the posterior aspect of the proximal tibia mimicking a parosteal osteoarcoma on the radiography, which showed a homogeneously radiopaque juxtacortical mass. However, subsequent computed tomography (CT) showed multiple intra-articular masses containing chondroid mineralization, suggesting synovial chondromatosis.

Keywords: synovial chondromatosis, parosteal osteosarcoma, diagnostic imaging

REFERENCES

1. Davis RI, Hamilton A, Biggart JD. Primary synovial chondromatosis: a clinicopathologic review and assessment of malignant potential. Hum Pathol. 1998; 29:683–8.

2. Milgram JW, Hadesman WM. Synovial osteochondromatosis in the subacromial bursa. Clin Orthop Relat Res. 1988; 236:154–9.

3. Norman A, Steiner GC. Bone erosion in synovial chondromatosis. Radiology. 1986; 161:749–52.

4. Villacin AB, Brigham LN, Bullough PG. Primary and secondary synovial chondrometaplasia: histopathologic and clinicoradiologic differences. Hum Pathol. 1979; 10:439–51.

5. Murphey MD, Vidal JA, Fanburg-Smith JC, Gajewski DA. Imaging of synovial chondromatosis with radiologic-pathologic correlation. Radiographics. 2007; 27:1465–88.

6. Edeiken J, Edeiken BS, Ayala AG, Raymond AK, Murray JA, Guo SQ. Giant solitary synovial chondromatosis. Skeletal Radiol. 1994; 23:23–9.

7. Levine E, De Smet AA, Huntrakoon M. Juxtacortical osteosarcoma: a radiologic and histologic spectrum. Skeletal Radiol. 1985; 14:38–46.

8. Lorentzon R, Larsson SE, Boquist L. Parosteal (juxtacortical) osteosarcoma. A clinical and histopathological study of 11 cases and a review of the literature. J Bone Joint Surg Br. 1980; 62-B:86–92.

9. Okada K, Frassica FJ, Sim FH, Beabout JW, Bond JR, Unni KK. Parosteal osteosarcoma. A clinicopathological study. J Bone Joint Surg Am. 1994; 76:366–78.

Figure 1.

Lateral radiograph shows a soft tissue mass (arrow) containing dense mineralization extending into the popliteal fossa. Partial attachment to the cortex as well as radiolucent cleavage plane was evident. Two small radiodense soft tissue masses (arrowheads) were initially missed on the radiograph.

Figure 2.

CT scan demonstrates the calcified small masses with target appearance occurring in the synovium more clearly (arrowheads), as well as large mass showing (arrows) extensive ring-and-arc mineralization that represents enchondral ossification of the multiple chondral bodies.

Figure 3.

Photomicrograph (original magnification, H&E stain ×200) shows the typical hyaline cartilaginous nodule with calcification (arrows).

TOOLS

Similar articles