PMC5824527_01
Clinical presentation of cutaneous horn on upper lip vermillion
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F1
Grade II mobility with respect to teeth (11, 21, 22, 23, 31, 41, 42 and 47). Generalized gingival recession and attrition were also seen in Figure 1.
Gross specimen A. Cutaneous horn with base - cut surface B. Excised tissue from adjacent area
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F2
One end of the specimen was soft in consistency, and the other end was firm which represents the horn [Figure 2].
Stereo microscopic view of the lesion A. horn with compaction of keratin B. verrucous carcinoma at the base
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F3
The underlying connective tissue exhibited mild inflammatory cell infiltration, areas of hemorrhage and muscle fibers bundles in cross sections [Figure 3].
Magnified view of horn showing compact concentric layers of cohesive keratinized material
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F4
The superficial layer of epithelium in one area showed exuberant keratinization in concentric layers forming a cutaneous horn [Figure 4].