Irritated lentigo or seborrheic keratosis

Irritated lentigo or seborrheic keratosis is seborrheic keratosis or lentigo that was inflammed for various causes. The lesion may have a similar clinical apperance to skin cancer. In this case, a biopsy may be necessary.

A biopsy is required if malignancy is suspected.

      References Irritated Subtype of Seborrheic Keratosis in the External Auditory Canal 29069875 
      A 56-year-old man presented to our outpatient plastic surgery clinic with a 1-year history of a slow-growing, painless mass in his left auricle. In the physical examination, we observed a 2.5 × 2.0 cm blackish papillomatous lesion within the left cavum concha, extending into the external auditory canal. There was no palpable enlargement of the regional lymph nodes. An incisional biopsy was performed to rule out a malignant skin tumor, and the histopathological examination revealed seborrheic keratosis.