- Diff Dx:
- Intracapsular Fractures
-
Toxic Synovitis of the Hip
-
Septic Arthritis
-
Osteomyelitis
-
Legg Perthes disease in children.
- Clinical Features:
- person suffering from a painful
Hip Joint effusion is most comfortable
when seated with the painful thigh lightly abducted and externally
rotated at the hip joint;
- this orientation reduces tension in synovial membrane to minimum
because it maximizes encapsulation of femoral head by acetabular
cavity and labrum;
- Radiographic Features:
- most sensitive indicator of
Hip Joint effusion in AP radiograph is
inferolateral displacement of femoral head from acetabular cavity;
- in children: look for medial displacement of
psoas line or
obturator line;
