Seborrheic Keratoses

Seborrheic Keratosis of the Ear Canal

“…Seborrheic keratoses are not immune to malignant conditions that arise in them, but these occur no more frequently than in skin that is not involved with seborrheic keratosis. 3 Although seborrheic keratoses are common in the head and neck region, their occurrence in the external auditory canal is rare. Only one report of a case similar to ours was found in the literature."…”

Clinicopathological findings of canine seborrhoeic keratosis with comparison to pigmented viral plaques

“…In dogs, these neoplasms are rarely reported and their prevalence is not known . In people, these lesions may arise as a single focal mass or, rarely, they may arise abruptly with a multicentric distribution and a predilection for the trunk and extremities . The human classification further subdivides SKs into seven overlapping histological subtypes, namely acanthotic, hyperkeratotic, adenoid, clonal, bowenoid, irritated and melanoacanthoma subtypes, with the three major subtypes being the acanthotic, hyperkeratotic and adenoid subtypes .…”