1. The Golf Ball Sign: Arthroscopic Localization of an Osteochondritis Dissecans Lesion of the Knee 
Jonathan Piposar, M.D., Karen Sutton, M.D. 
Arthroscopy Techniques 
Volume 3, Issue 3, Pages e343-e345 (June 2014)
DOI: /j.eats
Copyright © 2014 Arthroscopy Association of North America Terms and Conditions

2. Fig 1
Fat-suppressed T2 sagittal image of left knee in 12-year-old boy. The image shows an osteochondral defect involving the lateral aspect of the medial femoral condyle.
Arthroscopy Techniques 2014 3, e343-e345DOI: ( /j.eats )
Copyright © 2014 Arthroscopy Association of North America Terms and Conditions

3. Fig 2
Arthroscopic visualization of medial femoral condyle from inferolateral portal. The golf ball sign overlying the defect can be seen on the femoral condyle above the trocar.
Arthroscopy Techniques 2014 3, e343-e345DOI: ( /j.eats )
Copyright © 2014 Arthroscopy Association of North America Terms and Conditions