Acantholytic squamous cell carcinoma in the hard and soft palate: a case report - Custódio, Marcos; Gimenez, Lara Cristina Oliver; Ruiz, Marcelo Martinson; Witzel, Andrea Lusvarghi; Sousa, Suzana Cantanhede Orsini Machado (Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology, 2018)