False aneurysm of femoral artery from cancellous exostosis of femur. Report of a case in a boy of fourteen.

A boy aged fourteen trapped and tore at its origin a branch of the terminal part of the superficial femoral artery over a cancellous exostosis during extension of the knee from the position of full flexion. Three months later an expanding false aneurysm necessitated arteriography, after which suture of the tear gave a successful result.