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Invasive squamous cell carcinoma that initially presented as persistent erythema of the left buccal mucosa (Panel A; Day +5080) that then developed into multiple pink exophytic verrucous masses (Panel B; Day +5290) as well as more flat, erythematous and speckled involvement of the right mandibular facial gingiva (Panel C) and left lingual alveolar ridge (Panel D).
