Table 2. Complexity of Deltoid Ligament and Syndesmosis Injuries in Chronic Lateral Ankle Instability: MRI vs. Arthroscopy.

Injured Ligament		MRI (Number of Ankles)	Arthroscopy (Number of Ankles)	Sensitivity of MRI (%)	Specificity of MRI (%)
Deltoid ligament	Superficial	9	11	84 (16 of 19 ankles)	93.5 (29 of 31 ankles)
	Deep	2	2
	Superficial and deep	7	6
Syndesmosis	AITFL	19	21	91 (21 of 23 ankles)	100 (27 of 27 ankles)
	AITFL and IOL	2	2

AITFL = anterior inferior tibiofibular ligament, IOL = distal interosseous ligament