一、临床资料患者,男性,45岁,歼教-5飞行教员,共飞行3000 h。因“发现左颈部肿块10 d”于2002年9月入院。10 d前发现左颈部一肿块,后自觉肿块有所增大。无发热,无消瘦,无盗汗,无疼痛,无声音嘶哑。查体:体温脉搏血压正常。心肺腹未见异常。左颈部可触及一5·0 cm×2·5 cm大小肿 First, the clinical data Patients, men, 45 years old, J-5 flight instructors, a total of 3000 h flight. Because “found left lumbar mass 10 d” was admitted in September 2002. 10 days before the discovery of a lump of the left neck, after the conscious mass has increased. No fever, no weight loss, no night sweats, no pain, no hoarseness. Physical examination: body temperature pulse normal blood pressure. Cardiopulmonary abdomen no abnormalities. Left neck can reach a 5 · 0 cm × 2 · 5 cm size swelling