Introduction: Benign bone tumour, vascular and very painful, about 1 cm in size; elicits sclerotic reaction by the parent bone when the lesion is in the cortical bone; In cancellous bone the lesion is limited by a thin rim of sclerotic bone; in the spine it can cause scoliosis; if the lesion is in the metaphysis which is intraarticular can produce symptoms of arthritis; If the lesion is in the evolving stage it may not be seen routine plain radiography.

Incidence: Not uncommon; 10% of benign bone tumours

Differential Diagnosis: usually None in cortical bone, occasionally chronic osteomyelitis; In the cancellous bone - Brodie% abscess, arthritis, unusual form of tuberculosis

Prevention: Nil

Treatment: Excision in toto (enbloc in cortical bone); curettage in cancellous bone; In inaccessible locations - radiofrequency I laser ablation under CT guidance; curetted/excised material sent for histopathology