[Illustration: FIG. 70.--Cirsoid Aneurysm of Orbit and Face, which
developed after a blow on the Orbit with a cricket ball.
(From a photograph lent by Sir Montagu Cotterill.)]
The condition may be treated by excision or by electrolysis. In excision
the haemorrhage is controlled by an elastic tourniquet applied
horizontally round the head, or by ligation of the feeding trunks. In
large tumours the bleeding is formidable. In many cases electrolysis is
to be preferred, and is performed in the same way as for naevus. The
positive pole is placed in the centre of the tumour, while the negative
is introduced into the main affluents one after another.
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