A small patella from a child, showing gross distortion of the articular surface, with brown
discolouration of the central area.
This child was diagnosed as suffering from haemophilia, Type A, as an infant and, to the
age of 13 when the patella was removed, had had 31 admissions to hospital with various
haemorrhagic episodes. His knees had been involved on a number of occasions with resulting
distorting and disorganisation, which also involved the patella. In the course of reconstructive
surgery, the patella was removed.