“…A wide variety of systemic diseases have a direct effect in the oral mucosa, including viral infections, dermatoses, hematologic disorders, endocrine diseases, gastrointestinal disorders, malignancy, and autoimmune diseases, among others [ 123 , 131 , 136 , 154 , 155 , 156 ]. Ulceration, white patches, swellings, pigmentation changes, or periodontal inflammation are the main lesions found in the oral mucosa of systemic disease patients [ 135 , 139 , 143 , 154 ]. Although an association is obvious, whether alterations in the oral mucosa are solely a clinical manifestation of the systemic disease or whether they actively contribute to their development has not been clearly established for many diseases [ 144 , 147 , 156 , 157 ].…”