Perthes disease was recognised as a separate clinical entity over a hundred years ago and since that time, a huge number of scientific articles related to the disease have appeared in the literature. In spite of this high level of interest, the aetiology of the disease is still unknown and consequently no preventive measures can be considered, so treatment too is directed towards the effects of...

Osteopetrosis is a rare inherited disorder of bone causing increased bone density. Legg-Calvé-Perthes disease (LCPD), by contrast, is a more common idiopathic condition leading to variable avascular necrosis of the immature femoral head. We present a case of a 5-year-old boy presenting with these co-morbidities. We have found only one previous reference suggesting these two conditions can coexi...