Type | MGI:General | Description | aggrecan loss (as measured by loss of toiludine blue staining in the tibiofemoral joint) is significantly less (1.15+/-0.15 mean score compared to 1.94+/-0.13 in wild-type joints) tibial cartilage erosion is seen in 1 of 13 joints as compared to 5 of 14 wild-type joints |