. A radiographic atlas of the pathologic changes of bones and joints . nature of the fluid in the synovial sac. Mild cases undergo resolution. The more malignant ones causeextensive destruction of cartilage and bone. The majority ofcases become chronic. Here we find the following joint changes:At first the synovial membrane is congested and its tufts areprominent (Plate XLVI). Later there is more or less destruc-tion of the synovia, with the formation of small adhesions (PlateXLVII) and the tufts become large and projecting. As thedisease advances the cartilaginous surface is destroyed and re-
. A radiographic atlas of the pathologic changes of bones and joints . nature of the fluid in the synovial sac. Mild cases undergo resolution. The more malignant ones causeextensive destruction of cartilage and bone. The majority ofcases become chronic. Here we find the following joint changes:At first the synovial membrane is congested and its tufts areprominent (Plate XLVI). Later there is more or less destruc-tion of the synovia, with the formation of small adhesions (PlateXLVII) and the tufts become large and projecting. As thedisease advances the cartilaginous surface is destroyed and re-placed by granulation tissue. Fibrous (Plate XLVIII) and bony(Plate XLIX) ankylosis often result. — 132- PLATE XLVI. ARTHRITIS OF THE KXEE JOINT. The congestion of the synovial membrane and the prominence of itstufts are well represented on the skiagram by the gray shadow withfringe-like lower free border, in what is normally a clear space betweenthe lower extremities of the patella and femur and the upper extremityof the tibia. The tendon patella is also PLATE XLVI. — 134- PLATE XLVII. ARTHRITIS OF KNEE JOINT—SMALL ADHESION. A small band of adhesion between the spine of the tibia and the ex-ternal femoral condyle can be plainly seen. The shadow of the inter-articular space is darker than normal.
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