病例 :男 ,4 2岁 ,左下颌反复流脓两年不愈来诊。两年前 ,左颌下长一肿块 ,当地卫生院曾诊断为颌下淋巴结炎 ,给予抗菌药物治疗 ,未能治愈。随后肿块破溃、溢脓 ,后经多次局部换药及抗炎治疗 ,瘘口久不愈合。患者否认有结核接触史 ,全身状况良好 ,口腔专科检查 ,左下颌角内侧有 Case: Male, 4 2 years old, left leg repeated pus two years unhealed. Two years ago, the left submandibular long lumps, local hospitals have been diagnosed as submandibular lymphadenitis, antimicrobial therapy, failed to cure. Subsequent tumor rupture, overflow pus, after several local dressing and anti-inflammatory treatment, fistula for a long time does not heal. Patients denied a history of exposure to tuberculosis, general condition, oral specialist examination, medial left mandibular angle