患者，男性，４５岁。因左侧口腔颊部粘膜溃疡、肿胀，左侧口角溃疡，张口困难一月入院。查体：发育营养中等，表情痛苦，神志清晰，左侧颊面部肿胀伴口角溃疡、流涎，左颊部口腔粘膜溃疡，底部及周边有粟粒样结节突起，表面为白色分泌物覆盖，溃疡区与正常粘膜分界明显。全身 Patient, male, 45 years old. Due to the left cheek mucosa ulcer, swelling, ulcers on the left side of the mouth, mouth opening difficulties January admission. Physical examination: development of moderate nutrition, facial expression pain, clear mind, left cheek and facial swelling with mouth ulcers, salivation, left cheek oral mucosal ulcer, the bottom and surrounding miliary nodules, the surface is covered with white secretions, ulcer area Mucosal demarcation with the normal obvious. whole body