Oral and cutaneous manifestations of langerhans cell histiocytosis: report of two cases - Tenório, Jefferson da Rocha; Esteves, Camilla Vieira; Heguedusch, Daniele; Sousa, Suzana Cantanhede Orsini Machado de; Lemos Júnior, Celso Augusto (Journal of Oral and Maxillofacial Surgery, Medicine and Pathology, 2019)