Arthroscopic ImageIllustration

GROSS OCD LESION DESCRIPTION – CUE BALL

0 - No abnormality detectable arthroscopicallyIMMOBILE Lesion

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2 - Cartilage is intact and demarcated, but not mobile or ballotable with probing. This may be seen best under low light conditions, or tangential views.

IMMOBILE LESION

Arthroscopic ImageIllustration

GROSS OCD LESION DESCRIPTION – Shadow

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3 - Cartilage is demarcated with a fissure, buckle, and/or wrinkle, but not mobile or ballotable with probing (Wrinkle in the Rug)

IMMOBILE LESION

Arthroscopic ImageIllustration

GROSS OCD LESION DESCRIPTION – Wrinkle in Rug

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Arthroscopic ImageIllustration

2 - Cartilage is intact and demarcated, but mobile or ballotable with probing

MOBILE LESION

GROSS OCD LESION DESCRIPTION – Trampoline

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Arthroscopic ImageIllustration

3 - Cartilage fissuring at periphery, but unable to hingeMOBILE LESION

GROSS OCD LESION DESCRIPTION – Locked Door

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Video ImageIllustration

3 - Cartilage fissuring at periphery, but unable to hingeMOBILE LESION

GROSS OCD LESION DESCRIPTION – Locked Door

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Arthroscopic ImageIllustration

4 - Cartilage fissuring at periphery, with intact hinge (red arrows)

GROSS OCD LESION DESCRIPTION – Trap Door

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Video ImageIllustration

4 - Cartilage fissuring at periphery, with intact hinge (red arrows)MOBILE LESION

GROSS OCD LESION DESCRIPTION – Locked Door

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Arthroscopic Image

6 - Exposed sub-chondral bone defectCongruent = fragment fits into crater without modificationsIncongruent = fragment fits into crater with modifications

GROSS OCD LESION DESCRIPTION – Crater

1 - Congruent2 - Incongruent3 - Fragmented4 - Absent

Illustration

1 - Congruent2 - Incongruent3 - Fragmented4 - Absent

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Arthroscopic Image

6 - Exposed sub-chondral bone defectCongruent = fragment fits into crater without modificationsIncongruent = fragment fits into crater with modifications

LESION CLASSIFICATION – Crater

1 - Congruent2 - Incongruent3 - Fragmented4 - Absent

Illustration

1 - Congruent2 - Incongruent3 - Fragmented4 - Absent

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Arthroscopic Image

6 - Exposed sub-chondral bone defectCongruent = fragment fits into crater without modificationsIncongruent = fragment fits into crater with modifications

LESION CLASSIFICATION – Crater

1 - Congruent2 - Incongruent3 - Fragmented4 - Absent

Illustration

1 - Congruent2 - Incongruent3 - Fragmented4 - Absent

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Video

6 - Exposed sub-chondral bone defectCongruent = fragment fits into crater without modificationsIncongruent = fragment fits into crater with modifications

LESION CLASSIFICATION – Crater

1 - Congruent2 - Incongruent3 - Fragmented4 - Absent

Illustration

1 - Congruent2 - Incongruent3 - Fragmented4 - Absent

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