A Case of Melanoacanthoma on the External Auditory Canal.
- Author:
Chi Yeon KIM
1
;
Sang Young PARK
;
Seong Ki AHN
;
Chee Won OH
Author Information
1. Department of Dermatology, Gyeongsang National University, Gyeongsang Institute of Health Science, Jinju, Korea. deroh@nongae.gsnu.ac.kr
- Publication Type:Case Report
- Keywords:
External auditory canal;
Melanoacanthoma;
Seborrheic keratosis
- MeSH:
Ear Canal*;
Epidermis;
Female;
Head;
Hemorrhage;
Humans;
Incidence;
Keratosis, Seborrheic;
Lip;
Melanocytes;
Middle Aged;
Papilloma;
Parakeratosis
- From:Korean Journal of Dermatology
2007;45(4):369-372
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Melanoacanthoma, a rare benign variant of seborrheic keratosis, was first introduced by Mishima and Pinkus in 1960. It is a slow-growing, painless, pigmented plaque with a verrucous surface and a diameter ranging from a few millimeters to 10 cm. It tends to develop during middle-age with an equal sex incidence, and the lesion usually presents on the head, trunk, and especially the lip. It also has a histopathologic finding of mixed neoplasm composed of melanocytes scattered throughout keratinocytic lobules, and is characterized by hyperkeratosis, parakeratosis, acanthosis, papillomatosis and pseudo-horn cysts in the epidermis. We report a case of melanoacanthoma occurring in a 52-year-old female, who presented with an easily bleeding mass on her right external auditory canal, an extremely uncommon site.
