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. 2012 Jul 7;471(4):1137–1143. doi: 10.1007/s11999-012-2462-9

Fig. 6A–D.

Fig. 6A–D

ICRS classification. The ICRS divides OCD into four categories as follows: ICRS OCD I: stable lesions with a continuous but softened area covered by intact cartilage (A), ICRS OCD II: lesions with partial discontinuity that are stable when probed (B), ICRS OCD III: lesions with a complete discontinuity that are not yet dislocated but are unstable when probed (dead in situ) (C), and ICRS OCD IV: empty defects as well as defects with a dislocated fragment or a loose fragment within the bed (D).