An unusual myofibroblastic proliferation of the pinna

作者：Rowan C; Farboud A; Mitchard J; Trinidade A^*

来源：Journal of Laryngology and Otology, 2011, 125(4): 415-417.

DOI：10.1017/S0022215110002756

• Ear
• Myofibroma
• Wounds and Injuries

Introduction: Myofibrosis of the ear is rare. Myofibromas are mesenchymal tumours which usually present in infancy but have been reported sporadically in adults.
Objective: To present a rare case of trauma as a cause of pinnal myofibrosis.
Design and method: Case report. A 29-year-old soldier suffered repeated trauma from helmet wear and sports, and presented to our clinic with an exquisitely painful lump in the anti-helix of the pinna.
Results: The lump was excised uneventfully. Pathology revealed a reactive myofibroblastic proliferation which, given the history of trauma, raised the possibility of a florid cellular repair process. The main differential diagnosis was myofibroma. Immunohistochemistry was used to exclude other possible causes.
Conclusion: No similar case has previously been reported. The aetiology of myofibroma is unclear, but repeated trauma may be a trigger. Histological and immunohistochemical analysis are recommended when the diagnosis is ambivalent.

• 出版日期2011-4