title: Intra-articular knee haemangioma originating from the anterior cruciate ligament: a case report.
abstract: BACKGROUND
  Synovial haemangioma is a rare intra-articular benign tumour, which may arise from any synovium-lined surface, but particularly in the knee joint. Synovial haemangioma originating from the anterior cruciate ligament has not been reported previously.
  
  
  METHODS
  A 34-year-old man presented with a history of intermittent knee pain, locking and swelling.
  
  
  CONCLUSIONS
  Knee intra-articular haemangioma, a very rare benign tumour, is often misdiagnosed. Magnetic resonance imaging is effective in detecting this lesion and should be performed in cases of persistent knee swelling and pain.
authors.affiliation: Orthopaedic Department of Evangelismos Hospital, Athens, Greece. mtzurbakis@eae-net.gr
authors.forename: Mathaios
authors.initials: M
authors.lastname: Tzurbakis
authors.forename: George
authors.initials: G
authors.lastname: Mouzopoulos
authors.forename: Emmanouil
authors.initials: E
authors.lastname: Morakis
authors.forename: Gerogios
authors.initials: G
authors.lastname: Nikolaras
authors.forename: Ioannis
authors.initials: I
authors.lastname: Georgilas