Abstract
IntroductionSynovial 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.Case presentationA 34-year-old man presented with a history of intermittent knee pain, locking and swelling.ConclusionKnee 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.
Highlights
Synovial haemangioma is a rare intra-articular benign tumour, which may arise from any synovium-lined surface, but in the knee joint
Fewer than 200 synovial haemangiomas have been reported previously [1] and, to the best of the authors' knowledge, an intra-articular haemangioma originating from the anterior cruciate ligament has never been reported
A magnetic resonance imaging (MRI) scan showed a multilobulated tumour in the femoral inter-condylar notch cranially to the anterior cruciate ligament, measuring 15 mm in diameter (Figure 1)
Summary
Synovial haemangioma is a rare cause of knee pathology which, when undiagnosed, can lead to significant morbidity. Fewer than 200 synovial haemangiomas have been reported previously [1] and, to the best of the authors' knowledge, an intra-articular haemangioma originating from the anterior cruciate ligament has never been reported We report such a case, describe its clinical and imaging findings and discuss appropriate management. A 34-year-old man presented with a history of almost 5 years of symptoms in his right knee He reported injuring his knee twice after falling 3 years ago, after which he noted intermittent pain whenever he twisted the knee, into external rotation. A magnetic resonance imaging (MRI) scan showed a multilobulated tumour in the femoral inter-condylar notch cranially to the anterior cruciate ligament, measuring 15 mm in diameter (Figure 1). A 1.5 × 2 cm cherry-red villous nodular synovial mass was found in the inter-condylar notch, originating from the anterior cruciate ligament. At 4-year follow-up no recurrence was detected and the patient remains symptom-free
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