A Case of Seborrheic Keratosis of Cavum Concha

Abstract

Seborrheic keratosis is a common type of epidermal tumor caused by benign proliferation of immature keratinocytes. They usually appear as well-demarcated, slightly raised brownish patches or plaques. They are typically slow-growing, can increase in thickness over time, and rarely resolved spontaneously. Seborrheic keratosis is frequently found on sun-exposed skin surfaces such as the trunk, extremities, head and neck of elderly people. However, it is rare to find these lesions in the auricle or external auditory canal. In addition, seborrheic keratosis is often distinguished as a benign tumor, but there can be some morphological overlap with other malignant skin lesions. Herein, we report, along with a literature review, a case of seborrheic keratosis in a patient who presented with a mass in the left cavum concha with a sudden increase in size.