患者女,27岁。左颌下区肿胀2月,抗炎治疗无效且肿胀日渐加重,张口受限。检查:左侧颌下有5×6cm弥漫性肿胀,皮肤不红,扪诊局部波动感,穿刺抽出较浓淡黄色脓液,即切开引流。诊断为“牙源性化脓性淋巴结炎”“淋巴结核”。每日用生理盐水冲洗脓腔更换引流条,切开4天后发现脓液中有浅黄色 Female patient, 27 years old. Left submandibular swelling in February, anti-inflammatory treatment ineffective and swelling increased, mouth limited. Check: The left submandibular 5x6cm diffuse swelling, the skin is not red, palpation of local fluctuations, puncture out of a thick yellow pus, that cut and drain. Diagnosis of “odontogenic lymphadenitis”, “lymph node.” Rinse the abscess with saline every day to change the draining strip. After 4 days of incision, it was found that there was a light yellow color in the pus