ANEURYSMAL CYST, BONE TYPE, PRIMARY IN AN ARTERY

An aneurysmal bone cyst-like reaction involving the left common caroti d artery bifurcation in an otherwise healthy 7-year-old boy is describ ed. The patient presented with a 6-week history of an enlarging pulsat ile neck mass, The mass was excised with connection of arteries on eit her side with a saphenous vein graft. There were no associated intracr anial arterial aneurysms or associated skeletal lesions. A history of trauma could not be elicited. To the best of our knowledge this is the first report of an aneurysmal cyst, bone type, involving a large bloo d vessel.