ion of the hip in children which differs in many
respects from the juvenile form of arthritis deformans. Islands of
cartilage appear in the epiphysis of the head of the femur, and the
epiphysis itself becomes flattened without involvement of the
articular surface or of the acetabulum.

The disease is met with in children between five and ten; there is a
limp in walking without pain or sensitiveness, so that the child
continues to take part in games. Abduction is markedly restricted and
the trochanter is elevated and prominent. There is no crepitation on
movement or other signs of involvement of the articular surfaces. The
X-rays show the deformity of the head and clear areas in the interior
of the upper epiphysis corresponding to the islands of cartilage;
these clear areas resemble those due to caseous foci in tuberculous
coxitis.

The disease runs a chronic course, and in the course of a year or two
the limp and the restriction of abduction disappear, so that no active
treatment is called for.

#Neuro-Arthropathies.#--_Charcot's disease_ is usually met with in men
over thirty who suffer from tabes dorsalis. One or both hip-joints may
be affected. Sometimes the first manifestation is a hydrops and a
fluctuating swelling in the upper part of Scarpa's triangle. In many
of the recorded cases, however, attention has first been directed to
the disease by the deformity and limp associated with disappearance of
the head of the femur, or by the occurrence of pathological
dislocation. The absence of pain and tenderness is characteristic.
When dislocation has occurred, the limb is short, and the upper end of
the femur is freely movable on the dorsum ilii. When both hips are
dislocated, the attitude and gait are similar to those observed in
bilateral congenital dislocation. The rotation arc of the great
trochanter may be much reduced as a result of the disappearance of the
head of the femur. There may be considerable formation of new bone,
giving rise to large tumour-like masses in relation to the capsular
ligament and the muscles surrounding the joint.

The _treatment_ consists in protecting and supporting the joint. When
the affection is unilateral, advantage may be derived from a Thomas'
or other form of splint, along with a patten and crutches; in
bilateral cases, from the use of crutches alone.

_Loose bodies in the hip_ are mostly the result of hypertrophy of
synovial fringes in arthritis deformans and in Charcot's dis