Table 3.

Frequencies of osteochondral lesions on CTA and MRI.

	CTA (n = 79)		MRI (n = 79)
	Talus	Tibia	Talus	Tibia
	n (% of “total”)	n (% of “total”)	n (% of “total”)	n (% of “total”)
Full thickness cartilage defect
Total	n = 41	n = 31	n = 36	n = 20
Fissure	n = 16 (39%)	n = 16 (52%)	n = 6 (17%)	n = 4 (20%)
Small	n = 9 (22%)	n = 6 (19%)	n = 11 (31%)	n = 7 (35%)
Medium	n = 9 (22%)	n = 6 (19%)	n = 12 (33%)	n = 4 (20%)
Large	n = 4 (10%)	n = 3 (11%)	n = 3 (8%)	n = 2 (10%)
Extensive	n = 3 (7%)	n = 0 (0%)	n = 4 (11%)	n = 3 (15%)
Any cartilage defect a
Total	n = 51	n = 38	n = 55	n = 41
Fissure	n = 11 (22%)	n = 10 (26%)	n = 0 (0%)	n = 1 (2%)
Small	n = 13 (25%)	n = 10 (26%)	n = 11 (20%)	n = 13 (32%)
Medium	n = 11 (22%)	n = 9 (24%)	n = 13 (24%)	n = 10 (24%)
Large	n = 8 (16%)	n = 5 (13%)	n = 14 (26%)	n = 10 (24%)
Extensive	n = 8 (16%)	n = 4 (11%)	n = 17 (31%)	n = 7 (17%)

 ^aPartial thickness parts and full thickness parts.