Table 1.

Patient Demographics and Baseline Characteristics^a

Patient	Age, yb	Sex	Skeletal Maturityc	Duration of Symptoms, mo	Onset of Symptoms	Previous Surgery	Location of Lesion	Lesion Size, cm2	Graded	Treatment Method	Number of Screws	Bone Graft
1	22	M	Mature	36	Gradual	Plica debridement (2.5 years earlier)	Lateral Trochlea	1.5	5	ARIF	2	No
2	13	M	Immature	0.5	Acute		Lateral Trochlea	3.0	5	ORIF	2	LFC
3	18	M	Mature	12	Gradual		MFC	1.5	5	ORIF	2	Proximal tibia
4	17	F	Mature	36	Acute	Drilling of OCD (1 year earlier)	MFC	2.8	5	ORIF	3	Proximal tibia
5	25	M	Mature	48	Gradual		MFC	3.8	5	ORIF	3	Proximal tibia
Mean	19			26.5				2.5

^aARIF, arthroscopic reduction internal fixation; LFC, lateral femoral condyle; MFC, medial femoral condyle; ORIF, open reduction internal fixation.

^bAge at the time of operative fixation of the loose body.

^cMaturity defined as closure of the distal femoral physis.

^dGrade 5 lesion = chondral loose bodies without attached bone as an extension of the classification system proposed by Guhl.¹⁶