Recurrent spontaneous haemarthrosis of the knee associated with a synovial and juxta-articular haemangiohamartoma.


Several spontaneous episodes of haemarthroses of the knee in a young man led to repeated arthroscopic examinations and one arthrotomy of the affected joint until a juxta-articular haemangiohamartoma was indicated by angiogram. Excision of the malformation stopped the bleeding tendency. 

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