Arthritis Deformans of Knee-joint. 487 



nation. The greater part of the cartilage on the patella is in 

 the pile-of- velvet condition. G. C. 3157. 



Fresentedby A. G. Millek, F.R.C.S.E. 



7. 159. Early Stage of Apthritis Deformans.— Right knee- 

 joint of an adult, laid open from the front by turning down the 

 patella. The specimen is in spirit, showing changes in the 

 synovial membrane and cartilage. 



The patient was a healthy man of 50, whose leg was amputated on 

 account of a bad railway smash. His only symptom of trouble in the 

 knee had been occasional stiffness. 



There is a fibrous shreddy condition, and a wearing away 

 of the cartilaginous surfaces of the trochlea, and similar but 

 less advanced changes on the patella. There is also a slight 

 overgrowth of bone at the articular margin of the trochlear 

 surface. The synovial membrane round the patella is markedly 

 fringed. G. C. 2884. 



7, 160. Early Stage of Arthritis Deformans.— Lower end 



of a right femur and patella — in spirit, showing changes in the 

 cartilage. 



The patient was aged about 50, and his leg was amputated above the 

 knee for a railway smash. As in the previous case, he had had occasional 

 slight stiffness in the knee, to which, however, he had paid no attention. 

 At the time of the accident he was not aware that there was anything 

 the matter with the joint. 



The cartilaginous surface of the patella is irregular, especi- 

 ally at its lower part. There is also some roughening and 

 wearing down of cartilage on the trochlear surface of the femur, 

 while along the articular margin of the inner condyle a narrow 

 band of cartilage has disappeared. Round the patella the 

 synovial membrane is slightly fringed. G. C. 3129. 



Presented by Charles W. Cathcart, F.R.C.S.E. 



