stages between cartilage and
bone. They are pearly white in colour, pitted and nodular on the
surface, rarely larger than a pea, although when compressed they may
cake into masses of considerable size. With the movements of the joint
many of the tumours become detached and lie in the serous exudate
excited by their presence. They are found also in the diverticula of the
synovial membrane, in the shoulder in the downward prolongation along
the tendon of the biceps, in the hip in the bursal extension beneath the
psoas.

The patient complains of increasing disability of the limb, movements of
the joint becoming more and more restricted and painful. There is
swelling corresponding to the distended capsule of the joint, and on
palpation the bodies moving under the fingers yield a sensation as of
grains of rice shifting in a bag. If the bodies are so numerous as to be
tightly packed together, the impression is that of a plastic mass having
the shape of the synovial sac. The stiffness and the cracking on
movement may suggest arthritis deformans, but the X-ray appearances make
the diagnosis an easy one. We have observed two cases of this affection
in the knee-joint of adult women, one in the shoulder-joint of an adult
male (Fig. 168), and Caird has observed one in the hip. The treatment
consists in opening the joint by free incision and removing the bodies.

_Displacement of the menisci_ of the knee is referred to with injuries
of that joint.

INDEX

Abdominal aneurysm, 313
aorta, compression of, 269
embolus of, 93

Abscess, 46
acute circumscribed, 46
of bone, 448
Brodie's, 448
chronic, 139
cold, 139
embolic, 66
formation of, 47
Hilton's method of opening, 50
pointing of, 48
pyaemic, 287
residual, 141
of skin, multiple, 382
stitch, 51
treatment of, 49
tuberculous, 139, 141
peri-articular, 514, 517

Achillo-bursitis, 432

Achillo-dynia, 422

Acidosis, 251

Acromion bursa, 429

Actinomycosis, 126

Active hyperaemia, 39

Acupuncture in aneurysm, 308

Acute arthritis of infants, 440
necrosis of bone, 439

Adductor longus muscle, rupture of, 408

Adenoma, 202
malignant, 209
sebaceous, 393
of skin, 393
varieties of, 202

Adiposus dolorosa, 186

Aerobes, 19

Air embolism, 265
hunger, 276

Albumosuria, 195, 474, 492

Aleppo boil, 129

Alexins, 2