Auricular hematoma is a frequent complication of blunt trauma to the auricle. These are usually caused by sports such as boxing and wrestling. Hematoma formation is within the space between perichondrium and cartilage on the anterior ear. Because the blood supply to cartilage is dependent on the perichondrium, infection and cartilaginous necrosis often complicate untreated auricular hematomas. If auricular hematoma is not treated properly, it can progress to abscess formation, chronic scarring and fibrous organization with ear deformity
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Sellami et al. (2017) studied this question.