This is a frequent consequence of the flapping and beating of the ears. A swelling will, be observed on the inside of the flap, and extending sometimes from the tip to the base of the ear. It evidently contains a fluid. If it is noticed in its early stage, or if it increases very slowly, it may be worth while to attempt to disperse it by cold applications. Equal parts of vinegar and water will often be very useful for this purpose.

This course of treatment must not, however, be persisted in too long. If it is evident that the tumour, instead of diminishing, is continuing to increase, it must be opened, and the fluid evacuated. It will be useless merely to puncture with a lancet, for the orifice will close, and the swelling rapidly fill again. Either a seton must be passed through the tumour, or it must be slit up with a lancet from end to end. The latter is the preferable way. The black net-work lining of the cyst - ihe secreting surface - must he carefully taken out, and three or four pieces of lint must be introduced between the lips of the wound, and extending into the cyst, in order to prevent the incision from closing before the sides of the cyst had begun to adhere. In the course of a few days they will adhere; the cyst will close up as far as the incision; and then the wound may be permitted to heal.