Arthritis Deformans of HijJ-joint. 493 



7. 174. Advanced Arthritis Deformans.— Bones forming & 



right hip-joint — macerated, illustrating the above. 



" From a man who died of disease of tlie hip-joint. The capsular 

 ligament was much relaxed, and much coagulable lymph was thrown out 

 in the cellular membrane round it. The ligamentum teres was entirely 

 destroyed. The cartilaginous surfaces of both bones were much eroded. 

 The acetabulum was nearly filled up with coagulable lymph. The head 

 of the femur was dislodged from this cavity, and placed on the upper and 

 posterior of it. The head of the bone has, from ulceration, become less, 

 and the size of the cavity greater from the same cause. Some deposition 

 of fresh bony matter has taken place in theinnominatumin the neighbour- 

 hood of the acetabulum. (This preparation, and the history of the case, I 

 liad from Mr Brodie, 1807.) " 



The head of the bone is enlarged at its circumference by 

 new bone, which is also present on the neck in front. At the 

 same time the upper and inner part of the head has been 

 absorbed, but the surface of the remaining bone, though some- 

 what porous, is eburnated. The rest of the head of the bone, 

 especially on the front, is rarefied and irregular. Some new 

 bone has been thrown out at the attachment of the gluteus 

 maximus, on the small trochanter and along the spiral line. 

 The alterations in the cavity of the acetabulum correspond to 

 those of the femur ; the usual gap at the bottom is filled up 

 with rough and porous bone, and the articular surface at the 

 upper part is eburnated. The cavity of the acetabulum is 

 shallow, but the margin of the bone is irregularly prolonged, 

 especially at the upper part. The above appearances are typical 

 of " arthritis deformans." W. C, H. 43. 



7. 175. Advanced Arthritis Deformans.— Bones forming a left 



hip-joint — macerated, illustrating the above. 



" The limb was fixed by an imperfect anchylosis with the body." 

 The head of the femur is greatly enlarged round the margin, 

 especially below, but at the upper and inner part it is consider- 

 ably absorbed. The articular surface is porous, but eburnated 

 over the greater part of its upper aspect. The acetabulum is 

 partly filled up at the bottom, and is prolonged upwards and 



