||If the haematoma is not removed, then the subperichondrial collection of blood will persist, depriving the underlying cartilage of its critical perichondrial nourishment, thereby producing an avascular necrosis of the involved cartilage.
A simple aspiration of the haematoma is not sufficient as it will almost always recur.
The entire collection of blood should be aspirated under sterile conditions and the skin held down against the underlying cartilage by through and through sutures as discussed in the treatment of traumatic seroma.
Antibiotic coverage should be provided to prevent the development of acute perichondritis and subsequent cartilage necrosis.
A late sequela is the organization of the haematoma by the ingrowth of fibrous tissue and the development of a cauliflower ear.