Syphilis is a sexually acquired chronic infection caused by Treponema pallidum and is characterized by a variety of clinical manifestations. The secondary stage of the disease results from the hematogenous and lymphatic dissemination of treponemes after a few weeks or months, and it is characterized by recurrent activity of the disease, with muco-cutaneous as well as systemic manifestations. Mucosal lesions range from small, superficial ulcers that resemble painless aphthae to large gray plaques, and they are generally associated with systemic manifestations of the disease. The exclusive asymptomatic oral localization not associated with general manifestations is uncommon but may actually be unrecognized and under-reported. We report a case of isolated oral manifestation as the unique presentation of secondary syphilis.

中文翻译：

---

外观之外：孤立的口腔继发性梅毒的异常表现。

梅毒是由梅毒螺旋体引起的一种性获得性慢性感染，其特征是多种临床表现。该疾病的继发性阶段是由数周或数月后血色素的血源性和淋巴性传播引起的，其特征是该疾病的复发性活动，皮肤粘膜以及全身性表现。粘膜病变的范围从类似于无痛口疮的小浅表溃疡到大的灰色斑块，通常与疾病的全身表现有关。与一般表现无关的排他性无症状口腔定位并不常见，但实际上可能未被识别和漏报。我们报告一例孤立的口腔表现为继发性梅毒的独特表现。