Osteochondroma is the most common, benign, skeletal tumour occurring in 1% of the population and being more prevalent in males.1,2 Mostly metaphyseal in location, they develop from cortical bone hyperplasia at the epiphyseal plate.3 They are often incidental findings on plain radiographs during adolescence although, rarely, may be associated with vascular complications most often affecting the popliteal artery. 4,5 We describe a case of pseudo-aneurysm of the popliteal artery secondary to an osteochondroma of the femur in a young adult. Case reportAn 18-year-old man was referred to our institution with a 2-year history of swelling in the right popliteal fossa following minimal blunt trauma during a football match. A rapid increase in size had been noted over the preceding 2 months.A 10-cm, non-pulsatile, painless mass was found in the right popliteal fossa. Venous obstruction was evident with distal oedema and varicosities. There was no evidence of neurological compromise and distal pulses were palpable.Plain radiography revealed an osteochondroma arising from the distal femoral shaft without evidence of fracture (Fig. 1) A case of pseudo-aneurysm of the popliteal artery secondary to an osteochondroma of the femur in a young adult is described.
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