In situ melanoma of the gingiva associated with dense inflammation and pigment deposition: a potential diagnostic pitfall in evaluating stromal invasion - Sedassari, Bruno Tavares; Lascane, Nelise Alexandre da Silva; Freitas, Andre Luis Santana de; Mautoni, Mario Claudio; Sotto, Mírian Nacagami; Gallottini, Marina Helena Cury; Sousa, Suzana Cantanhede Orsini Machado de; Pinto Júnior, Décio dos Santos (Head and Neck Pathology, 2016)