Hip joint with acute swelling of the synovial membrane and ligaments

Watercolour drawing of a hip joint of which the synovial membrane and ligaments are swollen and intensely congested. The cartilages are superficially ulcerated. On the dorsum ilii, just above the margin of the acetabulum, is an abscess cavity communicating by a narrow track, through which a bristle is passed, with the acetabulum. A similar narrow track passes through the bottom of the acetabulum and communicates with an abscess cavity in the pelvis. From a child, aged 12 years, who died in the Hospital with purpura haemorrhagica.