PMC6727441_01
Lateral radiograph showing ossified fragment before arthroscopy.
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F1
Radiographs demonstrated an intra-articularbony fragment (Fig. 1).
a: Arthroscopic image heterotopic bone. b: Arthroscopic image heterotopic bone impinging in extension.
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F2
Arthroscopy was performed which showed a bony fragment impinging in the anterior aspect of the knee joint blocking full extension (Fig. 2a and b).
Radiograph following removal of fragment and progression to union.
JOCR-9-15-g003.jpg
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F3
The fragment was removed arthroscopically and his symptoms completely resolved (Fig. 3).