Figure 1

Photomicrograph of the cutaneous infundibular keratinizing acanthoma. Brown splash boston terrier dog. (A-D) Neoplasm consist of nests of well-differentiated squamous epithelium and nests of squamous epithelium with a continuous border of basal cells and also lesions are consistent with a simple or multiloculated cyst filled with keratin and lined by a wall of stratified squamous epithelium and keratin appears as a concentric lamellar mass, with a keratotic pearl aspect. H&E, 400×, Bar = 10 μm.