Businesses Warn Of Job Losses Threat As...
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No best answer has yet been selected by sweaty_betty. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.Must be Perthes. It is caused by a diminished blood supply to the femoral head which cause death of the bone often resulting in some deformity of the bone after recovery. Even though its called a 'disease' its actually a disorder and is no way contagious.
http://www.bbc.co.uk/health/conditions/perthes2.shtml