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Case Reports
. 2014 Aug;8(8):FD04-6.
doi: 10.7860/JCDR/2014/8841.4719. Epub 2014 Aug 20.

Malignant melanoma of the external auditory canal

Chebrolu Gowthami  1 , Prasanna Kumar  2 , A Ravikumar  3 , Leena Dennis Joseph  4 , Swaminathan Rajendiran  4
Affiliations
Case Reports

Malignant melanoma of the external auditory canal

Chebrolu Gowthami et al. J Clin Diagn Res. 2014 Aug.

Abstract

Primary malignant melanoma of the external auditory canal is rarely reported. Malignant melanoma of the ear is estimated to occur in 1-4% of all skin melanomas and about 7-20% of melanomas of the head and neck region. The pathophysiology of these tumours is different from other skin lesions because of their anatomical and functional characteristics. The case presented is of a 11 year old female child with malignant melanoma of the external auditory canal confined to the right side, who initially presented with right ear pain, bleeding, post auricular swelling and also a mass in the external auditory canal which was thought to be an aural polyp in the right ear. Excision of the tumour was accomplished by a radical mastoidectomy. It was confirmed to be malignant melanoma after histopathological examination and Immunohistochemistry. Despite all efforts, the patient succumbed to the disease after receiving three cycles of chemotherapy. Even though this malignancy is rarely found in the external auditory canal, it should be expanded into the differential diagnosis of an aural polyp and a post aural abscess. The incidence, symptoms, investigations, treatment and prognosis of malignant melanoma of the external auditory canal is discussed in this article.

Keywords: External auditory canal; HMB 45; IHC; Malignant; Melanoma.

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Figures

[Table/Fig-1]:
[Table/Fig-1]:
H & E images showing the spindle cell tumour (a & b) H & E X100; (c & d) H & E X200; (e) H & E X400
[Table/Fig-2]:
[Table/Fig-2]:
By Immunohistochemistry, the tumour cell were strongly postitive for (a & b) HMB 45 x 100; (c) S100 X 100
See this image and copyright information in PMC

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