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. 2014 May;48(3):332-4.
doi: 10.4103/0019-5413.132532.

Intraarticular osteochondroma of the knee

Vivek Morey Morey  1 , Divesh Jalan  1 , Ravi Mittal  1 , Shivanand Gamangatti  2
Affiliations

Intraarticular osteochondroma of the knee

Vivek Morey Morey et al. Indian J Orthop. 2014 May.

Abstract

Osteochondromas are usually extra articular and grow away from the joint towards the diaphysis. Intraarticular osteochondromas are very rare and often misdiagnosed. We report a case of 16-year-old boy who presented with pain and clicking sound in the right knee for last 6 months. On examination, click was felt at the terminal flexion of the knee. The lateral radiograph of the right knee showed a radio opaque shadow at the posterior aspect of the distal end of femur, which was further evaluated with an MRI. Arthroscopy showed a hard lesion arising from the roof of the intercondylar notch of femur. It was excised arthroscopically. Histopathology revealed it to be an osteochondroma. Thus, intraarticular osteochondroma of the knee can be considered as a rare cause of pain in young patients.

Keywords: Arthroscopy; intraarticular; knee; osteochondroma.

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Conflict of interest statement

Conflict of Interest: All Named authors hereby declare that they have no conflicts of interest to disclose.

Figures

Figure 1
Figure 1
Preoperative anteroposterior radiograph (a) and lateral (b) view of the right knee. Arrow in the lateral view shows a radio opaque shadow at the posterior aspect of the distal end of femur
Figure 2
Figure 2
Sagittal and axial T2 weighted MR image showing a lobulated heterogeneously hyperintense lesion arising from medial aspect of the lateral femoral condyle. Medullary cavity of the lateral femoral condyle is continuous with the medulla of the lesion
Figure 3
Figure 3
(a) Arthroscopic image showing a swelling in the intercondylar notch of the femur attached to its roof and lateral wall displacing the ACL anteriorly (b) Arthroscopic image after excision of osteochondroma
Figure 4
Figure 4
Gross specimen of the lesion showing cancellous bony mass covered with cartilaginous cap
Figure 5
Figure 5
Photomicrographs showing mature cartilage cap over bony stalk (H and E, ×100 and ×200)
See this image and copyright information in PMC

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